It depends fella... would need to know the model of Fusion and model of Intel CPU to give an appropriate answer.Are AMD fusion based laptops better for photo editing than standard intel ones?
Recent versions of Photoshop will take advantage of any GPU it can find. In the case of the two systems you highlight... I don't think there'll be much difference in performance one way or the other. Whilst the AMD arguably has the edge with the GPU, the Intel has the better CPU, memory bandwidth performance, and more cache. I would opt for the Intel-based solution personally.