Helix specific versions seem to absolutely be a thing.
their presentation makes it sound like a Helix game is easy to then port to PC without much work, but it's not exactly the same code, just VERY close to the same.
so probably for many games it will be the best choice to run the Helix version of a game. and if it's play anywhere you'll always just have the option to install the PC version I guess lol.
Steam compatibility is however also great if there are sales and stuff of course. so maybe you can get a game dirt cheap on Steam, and even tho it will perform slightly worse than the Helix version, it's still worth it due to the price