I own one of each. They are very similar, and use the same motors & control boxes.

Jarvis upcharges for "extended range", uplift has that by default. Uplift also has a little bit more reinforcing that makes it less prone to side-to-side sway. But only just barely. Not anything that would make me buy one over the other.

We have one of each purely for aesthetics. Uplift had what I was looking for, and jarvis had what my partner was looking for.