Watchdogs is unpolished and a pretty shabby job of covering up how bad the graphics are, driving is a mess for a game, when you consider you wanna have some fun, hacking seems great at first until it clicks that your basically pressing 1 button, and to top everything else off, everything from the beginning is right there, there isn't a reason to explore, you look at your map pick where to go and go, everything is unlocked from the beginning.
GTA5 isn't perfect steering way to much towards story than customization for my liking, stock market is a mess and a strange one when your a criminal of the lower part of the ladder, not enough businesses to take over not enough shops to rob, heists should be open to play in free roam and not just part of the story, Money means nothing in the single player game because by the end you have enough to buy near enough everything, and still have plenty left plus nothing seem's worth it, I mean once you finish the game and your only activties to mess about with is yoga and a triathlon, you start to wonder are Rockstars minds actually on a crime driven game anymore or not. except from all these things i'd like to be changed the graphics were superb for the time, the driving is so much fun, the story isn't half bad, the 3 way character selection is a nice idea, and the world is super polished.
so for me GTA5 is the better game but
GTA5 is So much EyeCandy and not enought interaction & WatchDogs is So much Interaction, but bland backgrounds.