Thanks, I think I willAs far as I can tell, the Classic (II) is a slightly updated Horn. The Revolution is a slightly updated Horn...and the 88 is a special edition version of the Horn.
And then there's the Evo, which would be my pick of the budget TJs.
Your best bet for the definitive answer is to drop TJ a line - they're usually pretty good at customer support.
What is the purpose of the internal rifling on TJ and Selmer's "booster" crooks? As well as a fair few of Theo Wanne's mouthpieces?
It's when they say "Oh, I thought it was a real instrument, not decor...until you played it" that you really gotta worry...I tried all three and owned a 88 Horn tenor. My personal opinion - Horn 88 sounds more open and has richer lower end. But that could be down to my mouthpiece matching the 88 better. The champagne finish seems to attract some attention from the ladies during gigs.
Something along the lines: "Oh, I thought it was decor not a real instrument until you played it...."