I like that one better.
He (I can see it's a boy) has better bone and looks more likely to stay sound for you. There's still something interesting about his hind end that I can't quite put my finger on and is he a bit thick through the throatlatch? At the end of the day, unless you're going to spend a zillion euros on a horse, you're probably not going to find one with perfect dressage conformation. You just want it to not be a conformational disaster and correct *enough* to do what you want to do and stay sound,
He might be slightly over at the knee, or holding his front leg at an odd angle.
I'd probably phone up and maybe look at that one, at any rate.