If both desks were the same price, this would be an easy recommendation. They're not — the Uplift is about $50 more — but for a piece of furniture you'll use 250 days a year for the next decade, $50 isn't the thing to optimise. Get the Uplift.
We measured both desks at standing height, at the user's ear position, using the same meter on the same day. The Uplift came in at 42 dB. The Jarvis came in at 48. That's not nothing — six decibels is roughly a doubling of perceived loudness.
At 47" the Jarvis wobbles enough to make the cursor jiggle if you bounce the desk with your wrist. The Uplift, in Commercial trim, does not. The difference is a steel cross-brace and a slightly wider stance.
Both desks ship with a cable tray. The Jarvis tray is too small and accessed from underneath. The Uplift tray is bigger than you think you need, accessed from the user side, and has rubber wire passthroughs.
This is the one round the Jarvis wins outright. The default Fully keypad has a backlit display, four memory presets, and buttons that feel like buttons. The Uplift default keypad is small and the $69 backlit upgrade is worse than what comes standard on the Jarvis.
We've had a frame issue on a previous-generation Uplift; they sent a replacement within a week. The Fully service desk is slower and the warranty is shorter. For a piece of furniture you keep for a decade, this matters more than the spec sheet suggests.