I just did a Sonic Titan vs Meathead shoot out all afternoon yesterday...
Meathead in dark setting, heaviest fuzz I've ever eard, good for slow tempo stuff. you can certainly use it on bass...!
Sonic Titan, more OD, excellent all-around heavy tube-amp driver, excellent for fast tempo stuff and slow, would be awesome on bass too!
now I have to re-build my board to use one for slow part and the other for fast parts...