Both are great detectors. I ended up with the F75 though. It's more ergonomic and better balanced than the AT Pro. It has more bells and whistles imho, and the separation is amazing. If you can afford both, get both. If you want to hunt in the rain and maybe freshwater beaches, go with the pro. If you want to hunt everywhere else, go with the Fisher. The F75 is an amazing machine, runs forever on a few batteries, and just plain rocks.