The mods who moved these comments from the OG Roc thread. Not that I blame them, Roc3s really should be discussed in a separate thread, and since there is one, here we are.
Depends on what you want it for. I have several worn in Champ Roc3s that fly like fresh McPro/whatever they want to call it, so I prefer DX b/c I can beat it in a little faster (I don't play as often as I did a few years ago, so it takes more to season a disc). And to be honest, the DX Roc3s I have are not really that flippy yet, so why spend more for something that works just as well?