I've got both and prefer the Bearpaw. The Big Shot is well made, but I don't like the thick seams along the edge of the fingers. They put pressure right on the cuticle of my index finger and it's very uncomfortable to me. I shoot split finger, this would not be a problem for a three under shooter.
I've only had the Bearpaw for a few months now, but it is wearing well. The Big Shot looks like it will last as long as any glove and longer than most, very heavy and well made.
Both work but are very different. I like the Dura Glove too, but both that I have had the fingers twisted up pretty bad. Over all I'd say the Bearpaw Speed Glove is my favorite.