I can see a slight difference, but I don't think the 60fps version is better or worse than the 30fps version.
In fact, I think the 30fps version has some sort of natural "image stabilization" to it.
I can't describe it - but the 60FPS version seems more "bouncey" to me. It's like it's on a handheld camera for some reason, versus a movie camera. I guess missing every other frame removes some of the extra motion you might pick up at 60FPS? I don't know - that's just how I see it.
Both are fine. I don't care if I play a game at 30 FPS or 60FPS, so long as they are locked in at their framerates.