Surface area you'll actually use, without the $800 markup.
A desk is just a stable plank. The trick is finding one that's wide enough (55"+), flat enough, and stable when you type. Electric height adjustment is the only feature worth paying for.
The sit/stand desk you actually buy instead of thinking about buying one. Dual motors, memory presets, quiet enough not to scare the dog. The particleboard top is unremarkable but flat and stable.
The desk you buy once. Dual motors, 355 lb capacity, and the C-frame keeps knees clear. Costs 2x the VIVO but you'll never replace it. Skip the bundled top and get a solid wood one from a local shop.