The newer Muzzys look better than the older style. Like Hatfield I used 4 blade muzzys for a long time until I had a bad issue with them. I switched to the 3 blade design. And for my light weight bow I use the Muzzy Phantom - a cut on contact head.
But now I currently use Slick Trick Viper Trick broadheads. IMO they are stronger and fly truer than Muzzys.
For some reason, no matter how well my bow was tuned I always had to adjust my sights when I switched from field tips to Muzzys. Not so with the Slick Tricks. Both my FTs and the STs hit the same POI out to 50 yards.