If you're talking about winning drives -- Luck with two TDs with 2:39 mins to go is not bad either.
I think it's a hard decision between RG3 and Luck now.
Luck almost certainly has taken his team to the playoffs, and had what most ppl thought was a pretty bad team. He doesn't have much running game to support him, and his defense has been pretty bad.
RG3 is statistically great, hasn't had his #1 WR or TE, and has been clutch in tight / pivotal games and is a walking highlight reel & cult-phenomenon. However, he has had a running game behind him and we're only 5-6 right now.
I think right now RG3 deserves the ROY, but I think Luck gets it if he goes to the playoffs and we don't.