This is all from my limited experience and knowledge
Star - durable and grippy (tend to be more overstable)
Echo Star - made from "left over" material from other star discs (meant to be echo friendly but turns out its not much different and makes the discs highly inconsistent)
Champion - super durable less grip (although I've only had trouble when they're wet)
Champion - Glow - same as champ but glows, and is always clear/white/pearly
Pro - stronger than DX and retains the grip (beats in SUPER fast making the disc more understable)
R-Pro - "tacky" plastic that is somewhat more mailable
RW-Pro - echo friendly wood plastic composite, ranchero special
KC Pro - harder durable plastic, little to grip (great stuff, seems very stable)
JK Pro - "for dryer hands" tackier plastic that helps spin the put better and stick in chains
DX - standard plastic gets chewed up through impacts over time.
DX - Glow - glow version of DX but often seems harder and less grippy.
Echo DX - echo friendly DX plastic
thats as far as it goes for innova. Also there are coveted grippy/tacky champion discs that sometimes make an appearance and some would argue that there are massive difference in JK Pro runs.