Yep, no problems with mixing and matching brand names. Afterburner only sees the GPU, not the tag on the cooler. I don't think you will be able to set individual OC profiles, since the GTX 750 Ti technically won't be performing any graphics work and won't be loaded with your graphics drivers. You will be using it for its processing/CUDA powers only, which will be regulated by the PhysX drivers, rather than the graphics drivers.
Sweet, thanks for the answer, I appreciate it!