Not a lot of experience with the Simplex but the other day was hunting with a friend, I had my Equinox 800 and he had a Simplex, and after I dug my forth button and he was having no luck, I had a decent signal and called him over. He went over it and got no signal at all. I dug it up and it was a small tombac button about 6" deep. I think it just goes deeper, you pay the price but there is a real difference.