I don't really agree with people who sum it up to "car and planes vs horses".

Sure the games have lot in common, but where GTA is action-packed and jumps the shark every other mission, RDR2 is more grounded and slower-paced, with a deeper and more adult writing.

GTA aims to be fun and irreverent. RDR2 is about the story, and can be emotional at time.

Some people think GTA5 is stupid and grotesque. Others that RDR2 is slow and boring.