While one is more explicit, I don't know that either of those games is any more violent than Roadrunner or Bugs Bunny cartoons.
While training to go to Iraq a few years ago, I had a discussion with a crusty SFC who had just returned from there about the younger generation. He was in his late 30’s early 40’s I was pushing 50. In our generation there was generally some trepidation about pulling the trigger for the first time against another human, he said kids today have no such concerns as they have done it tens of thousands of times via gaming. I left there feeling pretty good about the next generation as represented by those in the military, the did amazing things routinely. There are concerns about how this translates to society in general.