Murray doesn't use his fearhand to punish the opponent enough to really be like Lendl. He does grind them down with the 2hbh, but that's not similar to Lendl.
In the final against Ferrer, Murray hit a 96mph topspin fearhand winner. That's extremely rare power. You can watch whole tournaments and not see that. Murray also hit one that fast against djokovic in the USO final. If Murray used that shot more, he'd be more Lendl-like. Why he doesn't, I can't say, because it doesn't make any sense to me. He's in neutral rallies, and he has numerous opportunities to put a shank in the opponent's back with that shot, and instead just pushes the ball over the net.