they are all very digital
the metal master is good tho, you can get almost any sound you want out of that pedal, which is good.
i dont know much about the others, cept that youd probly be happier with a boss or a real danelectro pedal, not those mini shits that they sell in sam goody for 20 bucks, but the big ones that sell for more round 60.
the compressor/;sustainer is supposed to be good as well.