Proud member of r0k 4 Chr15t club, PM T3hRav3n/christianbassis to join.

The Rig:
Dean Icon
Cimar strat-copy
Ibanez GRX-40
Dean Edge-1 Bass
Digitech RpX400
Peavey Rage 158

Creater of Tuba players united, pm to join.
metal muff then, the names tell you..
Schecter C-1 Hellraiser
Ibanez EX 470 (1991)

Peavey 6505 combo
Vox Valvetronix AD15VT
Danville 1X12 Cab
Kustom 12w tube

Dunlop Crybaby
DOD overdrive(YJM)
Boss Ns-2
Dod 250 Overdrive
I own both.

You can cop metal distortion on the Pi, and cop fuzz onthe MM, but you really have to choose a priority. Sorry!
i also own both. if u turn down the dist all the way on the metal muff, u can get some big muff sounds, but with a lack of fuzz. if u want fuzz and some ok dist, go for the big muff. if u want brutal metal, metal muff. or as stated, buy both . gotta love ebay, u can get both for a little more than one retail.
Mesa F-30 - 1x12 V30
PRS SE Custom 24 (GFS Crunchy PATs)
PRS SE Singlecut (Evo/Air Norton)
1989 Starforce (GFS PowerRails)
Morley Tremonti Power Wah, TS7 (808-Mod), Pitchblack, Boss DD-3, DE FnC