I liked the SpectraDrive drive/distortion toneprints in this video more than I liked them in other online videos. But the Hartke colored the tone in ways I actually liked better.
TC’s darkglass clone toneprint didn’t really sound much like a darkglass (I can get closer with the battalion+BDI-21) but still sounded ok.
The SpectraDrive had a very clean, transparent preamp. If that’s what you want, cool.