Exactly.
Yes, the 599XX is silly money and yes it is a track-only version of the 599, but it simply isn't the same kind of car as a Radical which despite its "road legal" tyres is a racing car pure and simple.
My supercharged SR3 was simply incredible handling wise and with around 520BHP per tonne had pretty amazing acceleration too. But it was a flimsy lightweight open car that's about as raw as you can get. The 599XX has a glorious 6 litre V12 engine and awesome handling for such a big car. No I wouldn't buy one but for Ferrari to have achieved such a rapid lap time in a car of this mass is an amazing achievement.
I'd put money on the fact that given a choice virtually everyone here would prefer to own the Ferrari rather than a Radical, providing it was bought for them