Out of interest, do you run active or passive basses, and if the latter, through a stompbox pre or the like? Makes a huge difference, distortion wise, for me.
Also, as Wicked said, distortion might be more apparent at gig-level volumes. It's the main reason Orange added the Clean switch to this iteration of the Terror Bass; provide more clean headroom for people who're not too much into OD tones. Seems you'll like that switch, if you didn't get the Terror for (more or less) distorted tones.
Enjoy! And keep us posted on what you think of the full stack.