Had the Leo Vince 4 Road fitted today on the Fuoco. At the moment the Db killer is out, and it sounds like a KTM single dirt bike so I am told.
I rode it home from the dealer tonight and this is LOUD! (and I ride a Harley!) So the wifey says I can use the Fuoco tomorrow for work so I will put the Db killer in for comparison.
The exhaust note is fine at tickover and cruising, but give it a handful leaving the lights and it's like Jeckyl and Hyde
Cagers know you are there 
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OK, could not get the Db killer in this morning without forcing...and it would be a lot harder to get it out, so I went to work with it out.
I adjusted my riding style to suit ie don't gun it from the lights but stay one car behind from the front and the exhaust precence is good, feel safe with some sound eminating from the Wee Beastie. Cruising at 60 or 110 kph very nice.
Well pleased, will let you know what the wifey thinks next week after she has endured the 7am stop start crowd. 