Hard to tell with those photos as they're not on level ground or standing perfectly square, but from what I can see the TB has a very sharp slope to his shoulder. Nice legs and with level ground appears as though he should level out nicely.
The Standardbred is a bit long in the back and sicklehocked. He also looks like he could be over at the knee. Nice bum and and good, deep girth. Nice shoulder and head set.