im looking for a saturated heavy grit, think Smashing Pumpkins, and im thinking that some sort of 'Big Muff' is what im looking for.

but which one?

which would be better (and what are the differences) between a USA muff, Russian muff, Metal muff and Double muff?

thank you!
'87 Fender Strat
Oscar Schmidt Archtop
Laney LC15R
metal muff is designed for metal, double muff is like two muff together (i think), but i imagine that would be too much distortion
Ibanez SR505
Ashdown ABM 300 EVO II
Epifani UL410