i've read that the BB Bass may have a loss in bass? hmmm...not sure, have not tried it yet but will soon! i'm itching to try the BB and also the Pork Loin and also the VT Bass...VT Bass mostly for a different flavor...the other two pedals for grit and grind...so, it's kinda between Pork Loin and BB...
Green Rhino...yes, i've read about it...not tried it yet though...can it do the whole grit and grind mild low OD kinda thing in a way sorta like the Pork Loin for that kinda tone? seem slike more tend to favor the Pork Loin for that kinda tone...hmmm...
The BB absolutely does NOT have a loss in bass, in fact with it's active EQ it can BOOST bass significantly!!!
The Pork Loin is a great pedal. As some have said, it can sound a little dark, depending on how you use it and on the rest of your gear.
More poeple have the PL than the GR because it has been out a lot longer. You can get some very similar sounds out of them. The GR can get more 'rude' sounding and grindy, the PL tends to sound warmer and more 'vintage-y'. GR tends to cut through more. The PL has more range in the low gain area, meaning the PL can sound clean and then gradually warmer and eventually overdriven, where I found the GR went from clean to mildly overdriven without any real area in between. Just depends what you want out of them.
FWIW, I've had the following, but the only ones I kept are the BB and the Agro, but I don't use the Agro for 'overdrive' I use it for INSANE distortion.
SFT
Pork Loin
Green Rhino
Bad Monkey, (with and without bass-modification)
BBE Green Screamer (with and without bass-modification)Digitech Hardwire CM-2
Boss DS-1 (probably the only one I'd say to stay away from for an 'overdrive' sound, though it can be cool for more obnoxious sounds)
Probably others I'm forgetting.....
-JV