I have both. I find Alloy pretty useless, to be honest. It just doesn't sound good to me. Ozone is great if you're going for that highly produced dance music sound (Pink, Kelly Clarkson), but on regular rock tunes it's too much a lot of the time. It has it's own parallelling function, but even with that set all the way to dry, I find myself putting it on it's own channel so I can turn it down some more.