There's a user on Talkbass FaithNoMan that has loads of Billy Gould style Darkglass clips on his Soundcloud.
The B3K/B7K is scooped, but it is a rather narrow scoop at a certain frequency, paired with a big peak in the upper mids - it has no problem standing out in a mix as a result. There are frequency plots knocking about (again on TB).
I for one think the B*K series sounds best with a bass that has a natural tendency towards a scooped sound already, like a Jazz with both pickups on. I do not like the sound of it with my Precision at all. The Vintage is a better fit, but I found that too muffled up top (although I haven't tried the latest VMTD revision with the B7K-style attack switch). The Pike Vulcan however, is a beast with a Precision, loads of snarling mids that remind me of Geezer's more modern tones on Black Sabbath's 13. It is based on the Darkglass pedals, but the colour control on it blends between a 'less scooped B3K' and a 'brighter more agressive Vintage', which makes it very flexible.