Originally Posted by Slytat
That's a very bad comparison tbh, at least AFAIAC. I've only ever seen one game where PhysX was truly impressive (Mirror's Edge). It's been used to mediocre effect in other games, but most of the time, I find it unnecessary. I was going to put one of my 280s in my new rig for PhysX, but on reflection, I'd rather not mess around with hacks etc for the extremely limited gains that PhysX affords.
I'd give up PhysX long before I'd give up AA for example. But as you said, it's entirely subjective. I saw a video of Mafia 2's PhysX and it looks weak IMHO. Then again, I wasn't holding out much hope that Mafia 2 would be even half as good as the 1st one , regardless of PhysX.
All of these effects don't alter the gameplay, only the looks. You don't need really need them, so I think it's a fair comparison.