Mantle is just a graphics API like D3D (DirectX). DirectX 11 works perfect on both AMD hardware and Nvidia graphic cards. PhysX on the other hand is a different story PhysX is a physics engine which works with DirectX. But is limited to Nvidia GPU's unless you make it work on CPU's as well.Cormacolindor said:The difference is that PhysX doesn't work on AMD.
This is what Mantle is http://en.wikipedia.org/wiki/Mantle_(API)
I have a feeling Mantle will become like Glide. The good thing Mantle does is that it allows for more draw calls. But I am willing to be Microsoft will not stand for this and update DirectX to do this.