Waitt, what? There r editions now for the PC pass version as well?
I only have the standard PC pass that I got upon launch for a quid/month or sumthing crazy cheap. It's been serving me really well. Played way more stuff than I payed for. You will need to install the XBox app for it, but it works alright. Had zero issues with the games install or running them. Best thing is, that they got loads of big titles on their launch day, so whenever you see a highly anticipated game pop up on steam, you can probably find it in the xbox app on your PC as well and play it without the 70+ bucks you would be spending on steam. It's well worth it imo for games you just want to play through once.
Shortcomings are that most of the games are not moddable in any way! I learned this with MechW5 and resorted to buying it on the Epic store. Also, games do get rotated out after quiet a short time sometimes (think a month for the shortest) so you better pick up and play whatever catches your fancy as soon as possible. Some titles stay for rally long though, so no need to worry.
You can also buy the games on there with 10% off I think if you have the pass, and keep em as you would on steam. I would not recommend this, I'd rather look around for a cheap steam code, for the proper access to the game files and such. I have never bought a game on Xbox app, only played them with the pass.