I have run both back to back and you will love both of them. If you owned either one of them you wouldn't sale them. The max. broke and moved at a lower rpm and had a bit more snap then Sen. The Sen was a tad quieter maybe and can eat more power and pushes like crazy! One is a little easyer to adjust. i really am 50/50 on them. I also had a 383 with a 2.38 all the way up to a 2.88 on that prop. I have both maybe we can test some time?