TSK line axanthic.
I think there is some visual difference atleast in the few that have been produced so far (most I believe are TSK at this point). But some of the differences could depend on the quality of the pastel that comes through too. Hard to say.
It would be great to get a comparison shot of the different lines at birth and at 1 year to see the differences.
If I had to vote though I'd say I like the TSK versions the best.....but I'm biased
Thanks for looking!