I've had awesome blood trails from the Muzzy 100 3 blade. I don't see the need for the change. They fly good and penetrate well....just my .02

I shoot the 4 blades. I have both but for some reason tuning my bow to shoot the 4 blades was so much easier( backwards I know). They fly like lazers and have proven themselves on two 9 point bucks this year ( mine and my buddies), we both shoot same broadheads.

I just switched from the Muzzy 4 blade 100 grain to the 3 blade 100 grain. I think I like it better. Only thing I had to do was re-tune my bow because the three blade flew a little different than my four blade.