I used to be impartial to either. Maybe prefered Summit more as they seem to get orders to me a bit faster. But then for some reason I got locked out of my Jegs account and after several emails and calls and a few attempts to create a new account to my email unsuccessfully, I sort of wrote them off. I did try recently to redo my account and it worked, so I will be giving them a shot for next project. And when I say Summit gets orders pretty I mean real quick. On more than one occasion I have ordered something at night or early morning and have had it arrive late that day.