I've done speed bench with a buffalo bar, I didn
t particularly enjoy it. It was difficult, but not the way I was hoping. THE ROM didnt feel any different or more difficult ( though it was obviously slightly longer), but it was more the way the bar felt in my hands. I had to squeeze the fuck out of that bar to keep it from rolling around. I always squeeze the bar very tightly anyway, this isn`t something I need to work on. I did like it for DE squatting. Ours was a little thicker than a regular barbell and it sits on the back quite comfortably.
Anyway, take that with a grain of salt. I generally dont really like specialty bars for pressing. The club I trained at up until last week had a swiss bar, too. I only liked it for extensions. I DO like the fat bar, though.