The speed 12 is so awesome..
Not insanely fast off the line, but when you hit like 100 kmh (60 mph), it goes like pure hell up to around 320 kmh (200ish mph). It will destroy vipers, veyrons, and at a certain point it keeps up with x2010 (Obviously not for long - but for a few seconds it does.. Which is pretty impressive tbh).
There's a trick to it though. It has so much torque you can put it in 3rd or 4th gear, rev it up to max and let go.. It will make a huuuge cloud of smoke, and then get grip back eventually.. When that happens, everyone is left behind.
And don't bother trying it with automatic gear.. Manual or nothing, otherwise it will suck both in dragrace and around a track.