Start with what could make the setup fail.
Before comparing features, check the desk height, storage, room size, typing stability, user size, and how often the treadmill has to move.
Will it work with your standing desk?
These guides map desk setup constraints to the supported WalkingPad models. Start here when the desk might be the bottleneck.
What else could decide it
Hardware fit first, Mac control second
Pick the model that physically works in your setup, then use Paceora to keep daily control on the Mac.