On topic, GTAV offers more than Smash U in my opinion.

Well-crafted story and dialogue, solid mechanics, expansive open-world with many sidequests and distractions, a lengthy single player campaign, online mode with even more stuff to do.

The two games don't compare well, they aren't even the same genre. It comes down to personal taste obviously.

"Trick shot? The trick is NOT to get shot." - Lucian