I use the "regular" Empress compressor & the Cali76 CB on bass & have wound up preferring the character of the Cali76 most of the time. I think it's mostly that it has character whereas the Empress is seriously transparent to my ears. I think I also prefer the continuous ratio control on the Cali76 CB & I feel like I need to adjust input level w/ the Empress a good bit more switching between basses or pick vs. fingers.
I need to check out some comparisons of the old Empress to the Bass version here sometime. The old one is still a great compressor IMO, the metering is a heck of a lot nicer than the Cali & it has indeed been easier/more direct feeling for me to dial in as well, it's just been a bit clinical sounding to me compared to the Cali.
(edit to add that I run the Cali76 CB @ 18V, I also found it lacking in headroom @ 9V w/ my all passive compliment of basses)
I had the original Empress for many years before and it is an excellent comp as well. The added features on the new one take that excellent foundation and add some really important tools for me. The CB is no slouch at all and has its own qualities and as you mention, it's not as clinical, a little less transparent, but still right there with it. The new empress is different in this regard too, it's still your tone but just with more impact and life and is less clinical (going on memory). It feels weird saying that about a compressor, but thats what the good ones do IMO.