The Newton SV398 adds documented footrest tapping and a side smart dial with USB-C, while the original Newton remains an air-cell recliner with armrest smart buttons. Choose by the controls, massage features and upholstery you want, not the Newton name alone. Both original upholstery versions remain listed alongside the SV398.[new][old][synthetic]
Which Newton are you comparing?
There are three relevant listings, not two interchangeable chairs. The Newton SV398 is the version with the smart dial and foot tapping. The original leather Newton and original Synthetic Hyde Newton are separate upholstery choices within the original design.[new][old][synthetic]
That distinction matters when you compare photographs, specifications or prices. A lower-priced Synthetic Hyde listing is not automatically an SV398 in another fabric. Start with the full product title, then confirm the model and upholstery on the option you intend to order. The original versions are still offered; this comparison does not treat them as discontinued.
This is a specification-based comparison checked November 7, 2026, not a hands-on test. It separates documented changes from details that still need model-specific confirmation.
What changes on the SV398?
| Detail | Original Newton | Newton SV398 |
|---|---|---|
| Massage design | Air-cell massage | Air massage plus footrest tapping |
| Local controls | Smart buttons inside arm | Side quick controls with smart dial |
| Device connection | Confirm exact unit | USB-C charging |
| Upholstery choices | Leather or separate Synthetic Hyde listing | Leather listing |
| Published upright size, L × W × H | Confirm exact unit | 43.3 × 30.7 × 47.5 in |
| Published reclined size, L × W × H | Confirm exact unit | 63 × 30.7 × 30 in |
Sources: exact retailer listings and Svago’s current Newton specifications.[new][old][synthetic][manufacturer] A confirmation cell does not mean the original lacks a feature. It means this comparison does not substitute another version’s specification.
How do the positioning controls differ?
Svago describes independently adjustable backrest and footrest positioning on the current Newton, alongside handheld controls, memory programs and side controls. The original listing describes a handheld remote and capacitive smart buttons inside the arm.[manufacturer][old]
The useful question is which controls you expect to use every day. If you make frequent positioning adjustments, compare the smart dial’s location with the original armrest buttons. During a demonstration, check whether you can reach the controls in your preferred recline. Control layout alone does not establish better fit.
Is foot tapping the same as air massage?
No. Svago identifies tapping in the SV398 footrest area separately from its air massage. The original Newton’s documented massage uses air cells.[compare] Neither description turns the Newton into a back-roller massage chair.[manufacturer][old][compare]
Choose the SV398 if footrest tapping is a feature you specifically want to evaluate. If your interest is mainly air-cell massage while reclining, the original remains relevant. Do not assume foot tapping equals rolling foot massage, or that it promises a particular result. The mechanism and your preference matter more than a broad massage label.
What heat coverage is documented?
The current SV398 manufacturer page explicitly describes heat across the back and seat.[manufacturer] That gives you a useful question for a demonstration: how do those zones operate on the exact chair?
Do not read this as proof that the original has no seat warmth. Its sources use different heat descriptions, so this comparison does not make a narrower heat-zone claim for that version. Ask for the original unit’s operating instructions rather than using an incomplete table as evidence of an absent feature.
What stays relevant on the original Newton?
The original is still a powered zero gravity recliner with air-cell massage. Svago’s comparison page describes the Newton’s air massage and leather upholstery, while the original retailer listings distinguish leather from Synthetic Hyde.[compare][old][synthetic] Those are meaningful choices if you want a reclining chair rather than a roller system.
The existing original Newton review provides more context for that design. Keep its version in mind when reading older descriptions. A review of the original is not evidence that the SV398 has the same controls, internal components or fit.
Should you choose leather or Synthetic Hyde?
First decide which version you want, then compare the upholstery offered for that version. The original leather listing and Synthetic Hyde listing should not be combined into a single material claim.[old][synthetic]
Ask for a sample if color or surface feel is important. Compare the actual finish under your room’s lighting rather than judging from a small screen. Neither the upholstery name nor a product photograph proves resistance to pets, spills or wear. Use the care instructions for the exact material, not a cleaning recommendation copied from another Newton.
How should you check room and personal fit?
The SV398’s published reclined length is 63 inches, with a width of 30.7 inches. Svago also publishes a 16-inch wall clearance for that model.[manufacturer] Reclined length and rear clearance describe different measurements. Do not use either figure alone as the complete room requirement.
Mark the chair’s position on the floor, allow for legrest movement, and keep a usable route around it. Measure the delivery path separately, including hallway turns. Before ordering, have the exact carton and assembly requirements checked against that route.
Physical dimensions are only the start of fit. In a demonstration, notice where the head support sits and where your legs meet the footrest. A chair can fit the room without matching your preferred sitting position. Confirm the exact unit’s user limits before purchase rather than transferring a limit from another Newton page.
Which version makes more sense for your budget?
Shortlist the SV398 if its footrest tapping, smart dial and USB-C connection are the changes you want. Keep the original on the list if air-cell reclining is your main goal or its upholstery options suit your room.[manufacturer][old][synthetic]
Compare current quotes for the exact options. Do not assume a permanent price gap, equal delivery services or identical warranty additions. Write down which documented difference earns its place in your budget. If you cannot identify one, the newer name alone is not a reason to spend more.
Frequently asked questions
Is the original Newton still sold?
Yes. Both the original leather and Synthetic Hyde versions remain listed separately from the SV398 on eMassageChair as checked November 7, 2026.[old][synthetic]
Does either Newton use back rollers?
The cited descriptions identify air-cell massage for the original and air massage with footrest tapping for the SV398. They do not describe a back-roller system.[compare][manufacturer]
What is the clearest control change?
The SV398 has a side smart dial and USB-C connection. The original listing describes armrest smart buttons and a handheld remote.[manufacturer][old]
Can I assume the two versions fit identically?
No. Confirm the exact version’s dimensions, operating clearance and user limits. Similar photographs or a shared family name are not enough to establish identical fit.
Want help choosing your Newton?
Ask an eMassageChair expert to compare the exact model, upholstery and room measurements you are considering. Bring the product links, your available floor space and the control features that matter to you.
