-
Its quite similar, they also had the Undead Nightmare edition which was mint, as it was full of zombies. I love zombie games. Have I mentioned that? I completed it after quite a few shandies, forgot what happened, and was a zombie next time I played. All very odd. Its a slower pace and I felt more "realistic" than GTA (less explosions and flipping vehicles). Online was hell as there was always some little cunt with a sniper rifle and his pimply little face pressed up against his TV killing you from a K away. Come to think of it, reminds me of another game...
-
RDR was built in the same engine as GTA IV. We can assume whatever they're about to announce is in the GTA V engine.
Either way, it doesn't matter; the story is what drives RDR. It's the best story (imo) of the last generation of games.
If you have an xbox 360 or xbox one, i suggest you buy RDR immediately.
More like the other way round, RDR was so much better than GTA at the time, the latest GTA took some clue from RDR (like the side quest that make it feel less linear).