The other thread was just about RDR2+Witcher 3. But Odyssey (just started so can't say how it is later) is a huge game as well and it pretty much just came out.
This of course personally doesn't help me choose a game knowing the two, since I already have Odyssey and I don't have a console. But maybe this will help others decide between the two. How would you say the two games compare with each other? In both world, immersion, story, voice acting etc.
My Skyrim, Fallout 4, Starbound and WoW + other game mods at MODDB:
https://www.moddb.com/mods/skyrim-anime-overhaul