Look that's fair enough - I'm trying to use terms to describe something that I've never heard, only read about. And worse, I'm having to make buying decisions based on not hearing any of the AK line at all.
From my understanding of the differences between the product lines, the TC will be super honest in terms of what I put in, I'll get out. The Hathor/Changeling range will impart more of their own "sound" onto whatever signal I feed them, however they in their own right are very clean and highly flexible (as you've mentioned, with the mids switches and porting options).
I'm used to play rock/heavy rock/pop/alternative, and am starting to move into more synth territory. I like dirt/drives. I don't play URB and don't really have plans to. When running the Quilter, I love that it's clean, but I find myself looking to options (eg: Helix/Noble) to add colour to my tone.
I *think* I want a cab that's relatively uncoloured and highly flexible. I'd like to have the same cabs that I can use for any gig that I might find myself in. But that's the key word here; relative. From everyone else's opinions and experiences, I think the Hathor/Changelings will get me closer to what I want.