I've long said that while both are great drummers, Portnoy has a knack for making something in 3.1415/√3 time sound like a 4/4 shuffle, and Mangini has a knack for making something in 4/4 time sound like 0.33333/∞, but that's his thing. It's cool. I do like his passion and curiosity, though, and while I'm not a drummer, I do find it interesting. Words are hard, though, and don't do it justice. It'll be interesting to hear and then compare to the words.