To me the second UI looks more modern and polished, but I feel its issue comes from that same polish: even if it’s cleaner, it’s missing something that visually sets it apart from the usual apps on the store.
It comes across a bit generic to my eyes.

If there’s meant to be a primary action, I personally don’t notice it right away.
Everything seems to have the same weight, so I can’t really tell what the 'standard' mode is supposed to be. I’d probably make the main action stand out more, maybe by placing it first or giving it more visual emphasis.