The short answer is I'm not sure. The exhaust for sure sounds better. I still have the baffle in so it's not crazy loud but it still has a nice deep sound but is just a bit louder when cruising at highway speed. As far as the Flash Tune goes, I have not had the bike long enough and it's still in the break in period so I am not really going nuts with the gas so far. (I think I had 300 miles on the clock when I sent it in for a tune). Also, I only did the tune because I added the Akra Ti Exhaust rather than for the tuning benefits. Compared to my 18 MT07 that I just sold, this bike has lots of zip (with or without the tune/exhaust) so my baseline is the slower bike which means I can't really point at the exhaust or tune to say, ya those are WAY better that stock (that was the long version of the answer).