Have different editions even been announced yet? I only know of the Collectors' Edition, which comes with a Jill statue and some other objects besides the game, but I don't know the difference between the other three options in the poll. If this is about CD vs. digital download, I'm going with the latter.
Why editions that include physical objects aren't usually available to PC players is a mystery to me, since none of those objects have anything to do with the platform you're playing the game on. It doesn't bother me personally because I have no use for statues and other toys / decoration anyway and only care about the playable content, but a friend of mine and fellow PC gamer regularly complains about it (last with Shadow of the Tomb Raider), and I understand his frustration.
Probably because PC make poor sale comparing to ps4 and Xbox one, that's why they only release regular version for game, and Also because digital version it's more used on PC... I hear that sometime they release collectors edtion via code on PC but rarely on phisical
Standard edition: is the regular phisical edition that came whit just the game, and a code for the original classic costume if you pre order it
Lenticular edition: same as the standard edition but whit an additional lenticular cover on it... Capcom didn't announce this yet but since it was released for both resident evil 2 remake and devil may cry 5 it is very likely they are going to release it for resident evil 3
Collectors edition: the one whit the Jill statue, soundtrack, raccon city map ecc and game
Unfortunately this version was only announced for gamestop America and its impossible to pre order it from other countries since gamestop only dyspatch in its own country, I can't even access the site from Europe... But fortunately it will probably be announced soon since resident evil 2 collectors edition was first announced in America and than in Europe a month later, also Capcom community manager on Twitter say that news about collectors release in other countries will be released soon
Digital edition: the digital edition of the game, you can get it on the ps store, Xbox Market or steam
Steel book edition and limited edition?
Resident evil 2 and dmc 5 both got a steel book so probably re 3 will get one
Deluxe edition?: resident evil 2 got a digital deluxe edition whit more costume, original soundtrack and wesker samurai edge, will re 3 get on too? Probably
For now only standard, collectors and digital edition have been confirmed