I like them both to be honest. I arrowed my first buck with a muzzy 3 blade. I do feel the slick trick is more consistent on weight distribution though. If you will be practicing with broadheads then save money and go with the muzzys. On the other hand if you will be mainly practicing with field points than the Slick tricks are better in my opinion. The Slick Tricks also seemed sharper straight out of the package.
That being said I a have been giving the expendables a chance the last few years. I've shot several with the rage 2 blade and haven't lost one yet. The only problem is the head is toast after each deer I've hit. Tried Grim reapers and had great success with them as well but the replacement blades are hard to find where I live. Last year I shot Xecutioners and took one buck and he only ran 60 yards but it uses orings and I really don't like that. I have also tried NAP killzones. the one doe I shot I never found. Might have been a little high but did get a complete passthru.