They look like they're in about the same position or lower than the sticks in the steam deck.
I'm guessing it's a little lower since there's no screen in the middle so your hands are angled together a little more.
Idk, it just looks weird, maybe since its a render, but unless this controller is very small it does not look comfy. The steamdeck controls seems fine, due to how you're forced to grip it, although I've never tried it.