The point I am making is fun in THE REAL WORLD, at least in the US or any place on the planet that doesn't have an autobahn. All of these high speeds are illegal and will likely never be attained by anyone driving these cars, so to talk about them as if they are meaningful in a decision is ridiculous.
The BMW at 2.6X seconds 0-60 for the 2012 version and 2.7 for the 2011 version according to motorcycleusaDOTcom test
EVO magazine article -- "It will be more interesting now that the Bugatti’s launch control, having performed faultlessly to allow the Veyron to record 0-60mph in 2.8sec"
Quarter Mile
1986 Benetton B186 : 9.400secs (race boost 3.7 bar)
BMW S1000RR : 9.681secs
Bugatti Veyron SS : 9.700secs(claimed)
Ultima GTR 720 : 9.941secs
Bugatti Veyron : 10.500secs(Evo Test)
Bugatti Veyron : 10.100secs(Car and Driver)
Bugatti Veyron : 10.200secs(Road and Track)
Bugatti Veyron : 10.400secs(Motor Trend)
Bugatti Veyron : 10.600secs(Road and Track)
In my drive a few weeks back I must have accelerated 10 seperate times as fast as it would go up to certain points and I can tell you that that is more exhilarating than sitting in any car and stepping on the gas. The bugatti is extremely ugly and impractical and basically only exists for speed. (not just my opinion)
FUN is the desired end result, feeling g forces, controlling power, adrenaline. The S1000RR will deliver that better than a bugatti every day a sane person wants to drive a high performance vehicle (See John H's thread for thrills in the wet). Mine never go out in the rain. In the dry I have pushed them quite a bit.
I think if you want to feel speed get the BMW, if you want to display wealth get the Bug. (maybe you should enter next years IOM TT in your panny)