I don't really worry over the whole SR vs GTA comparison. It happens, but they're very different games by this point.. in fact, very different games than they started with for their own series. The companies have grown too behind them.
I think there's lots of space on the internet to have both.. and yes there IS a lot of copying back and forth. It's good. It means that there's ideas on both that are worth implementing in other games. Everyone always complains that "They stole that from Game Y" but what they also fail to realize is that game Y stole from game X, from W, from right back to A. Innovation doesn't mean you throw out everything and start 100% from scratch. If that was the case, there wouldn't be a thing as a genre. And we wouldn't have any new games, because the very idea of a computer game is copied right from Spacewar and so on. Things are copied, used, improved. The thing that matters is how the game is, not what other games it's like. Sure you compare, but compare to see which does whatever BETTER, not that "Oh they did it first!"
Although, what I DO take offense to is the idea that somehow GTA:V deserves 100% scores. That's just asinine. Or idiots. Or bribery/strongarming. I did laugh at a webcomic on the escapist however.. it fits their review not giving it some perfect score to follow lock-step. My guess is they're not big enough for R* to pressure them, unlike say IGN/Xbox Gamer/PS Gamer/etc.