I've looked through this board and can't find any reference to the specific question that the F2 and F75 are the same machine. I' ve talked with a couple of dealers and it was mentioned that performance wise the are identical. The SE and LTD versions both have the boost mode and quick grab features. There maybe cosmetic differences but basically, side by side, if both machines where set up the same using similar coils they would equally locate gold or silver at equal depth. Would like to hear from the real experts, the users of these machines to weigh in and agree or refute what I'm hearing. Thank you all.