I am not too technical on the details but what is the deal exactly with ProgPOW? It seems that it will level the field with ASICs and GPUs however the brand of GPU seems to play a factor.

It seems that Nvidia performs much better than AMD, and is the reason for this that Nvidia generally costs more and since it costs more they want to make it more fair in that regards.

For example, say you can buy 2 AMDs for the price of 1 Nvidia. The 1 Nvidia will perform at the exact same speed as the 2 AMDs combined. Is this the point they are going for or is it just the way that the current miners are optimized?