Texas star is ab-1 biased, less efficient than class c but also cleaner than class c.
Only reason a TS would run less clean is if it were overdriven, they dont take much drive.
Almost all texas stars are designed to run at max with maximum 4 watts rms drive.
You must read from the big book.
Fatboys are not biased at all, so what goes in gets multiplied. All radios produce some harmonics....
You can get a biased fatboy, i have a 1x4 here that is ac-1 biased. Nothing like texas star biasing, but cleaner than C.
TS are cheap, i can get them at good prices straight outa outcom.
Tubes are better.
200 for a killer bee.
150 for a davemade m-80.