with Unga nowadays, cuz I think Luke's success was very dependent on a very crafty pitch-man. Without Doman Luke doesn't get the space he needed to get his horses churning. Luke was very fast & could make a very quick, hard cut once he got going. That said, Luke's first step was like he was running through tar. In fact, his first two steps were like that.
Harvey didn't have near the top-end speed of Luke, but his first step was incredible for his size. I think his vision was a bit better too (though Luke's was very good).
mutu.