For me at least the Fury will fade out after it turns, whereas I don't get that with the Underworld. The underworld holds a solid anny and doesn't come out at all. This could be a form flaw, and I've only thrown both a few times. I personally get a lot more distance with my fury then my underworld and 9 out of 10 times it will come out of the turn at the very end.
If I'm online then that means I'm not throwing plastic...Which Sucks.
Riot/ Fury/ Saint Pro/ Escape/ Stag/ xXx/ Underworld
Warship/ Tursas/ Core/ Mace/ Truth/ Suspect