There were some design changes - controls were relocated as was the switch and it's now easier to change the battery. There were no changes to the circuit. The Animals Pedal info says, "the overall range of timbres has been expanded and tweaked to create the best sound with more amps and...
I had a board with 15 pedals on it. I play neo-Psych, Shoegaze and trippy Blues and used them all. I haven't gigged in years so I don't need it anymore. Some players might . . .
SCENARIO 1: If you play in a cover band, you may need a lot of pedals to cover many sounds and styles, and...
As Wildeman stated above, I experienced seller's remorse every time I sold a piece of gear. While I haven't sold anything since the late '70s, I have given a few things away to young players who couldn't afford them.
My absolute keepers are:
AnalogMan Dark Peppermint Fuzz
ehx Attack Decay...
Cheap, no-name wah with a scratchy pot. I was into Cream and Jimi.
Red and blue Uni-Vox Superfuzz. It worked for early Black Sabbath. Wish I still had it.
Used both between my Fender Mustang and Ovation Cat System amp.
Sold everything a few years later for college money.
I have a dozen fuzzes and the DOD Carcosa is one of my favorites. It's versatile and you can get a lot of different sounds out of hit from subtle to raging. I'm very happy with it.
No experience with the Mas Malo, though.
I still have my TZ2 "The Fuzz". Sounds like a Super Fuzz though the circuit isn't quite the same. You can get some ring mod sounds out of it, too. Like most everyone else, I hate dealing with the rubber ring to change the battery. Little box, huge sound!