The second horse is MUCH nicer. Much more power.. but from the still shot I would really check her feet. Also from the still shot in the pasture she appears slightly back at the knee. I would love horse #2 for dressage but am not sure I like those front legs enough for jumping.. and her feet look very very short.. almost soft and thin walled (but you cannot tell without looking at them).
Both horses need to be seen in person. If the first one is from a bad dealer I would ask for references (may or may not help). Maybe not even go see her. The second horse is worth a look.