I *think* image 1 is TG2 - perhaps the shadows in image 2 are just a little more convincing? Also, I think TG2 is rather prone to a slightly grainy "lumpiness" in clouds at small scales that Nature doesn't often show. But by golly, it's close! Fantastic work!
EDIT: would be interesting to see just how close-up one could get to the TG2 image before it becomes obvious.