Key phrase is "potential 1st rounder". Sam Hartman never really had that said about him, and I really liked us getting Sam and think he did pretty well. Riley's a thoroughbred who needs polish. 3 years younger, 3 inches taller, and ~3/10ths of a second faster on his 40 than Sam Hartman.
Hartman was a known entity. Dependable, but never going to take over games. Riley could do that.