Before recent times I would say the Ferrari! Lambo's were built to be crazy and as "cool" as they were if not over eccentric they didn't have that edge that Ferrari had. See the Countach for an e.g.
Recently though Lamborghini is about as Italian as I am. Went it was bought out by Audi AG they took the mental image that was Lamborghini and toned it down and got one hell of a result. The engineering is just mental and if I had to pick between a Gallardo and an F430 (both similar priced) I'd pick the Gollardo in a heart beat.
Anyway that's my views. In a F1 racing game though, Ferrari owns everything.