Maybe I just don't know what LRG is exactly, but I couldn't figure out what this is exactly. Is this just the same game that exists packaged in special packaging with extra stuff, or is the game being redone as well? I thought they already did a remaster not too long ago, so I really have no idea what this is offering exactly.
So this is actually the second remaster of the game. The first one was released several years ago, and I believe it was mostly just a pretty typical HD remaster. This one was released a couple weeks ago and further updates the graphics and audio, while also adding several new features along with a new sidequest that connects the story of this game with the sequel.
What LRG is offering here is the remaster that was released a couple weeks ago, but in physical format, as it was digital-only and didn't get a retail physical release. Basically for anyone who wants a physical copy of the game, either to collect or for preservation. (Though not so much preservation for the PC edition, since it'll still be bound by Ubisoft Connect's DRM.) Or in the case of the Collector's Edition, anyone who wants the trinkets and things that it comes with.