Clean, I like both Darkglass and Tech21NYC. Dirty, the BDDIv2 and VTDI beat the Microtubes by a city mile. Distortion on bass mostly sounds like crap, but if you have to use it, for gods sake, don’t use Darkglass, as they are among the worst of them for distortion.
I know this is an unpopular opinion, but I agree - Darkglass is my least favorite flavor of dirt.