Here's my take: The tunes for a classic are the same, except they limit your max speed. Check out the power curve bands on all the tunes. Most start out near fun power to about 1500 rpm then drop into a valley , then back up to near top at about 6k rpm. Weird. One tune gives you full power in 4th and 5th. For the classic it's 20143 (one of the new sets of tunes which is described as full power, without catalyst. There is no full power tune for tors and w/o catalyst). I don't know which of the new tunes is the same ,yet for the standard R3.
In regards to no volumn/sound difference with tors vs stock: I find a huge difference. If you go just tors... it's a little louder. With cat replacement and stock pipes.... just a little louder. With both....much louder (weird).