If i ever have to choose between a Lambo and Ferrari, i think i'd choose the Lambo. Lambo's are always about brute strength, lots and lots of power and quite rightly said flashy. More than often, their styling points towards the extreme and people love them since those days because its just so damn different from the rest. If you look at the Diablo, its just so different from any other sports car. The design is unique. They're about making the fastest car in the world and they don't care if the general market would accept that car or not just as long as a small percentage of people who could really appreciate the fun and speed which the Lambo produces.
Ferrari's on the other hand have a long tradition of building a racer's car, they care more about craftmanship, ensuring each Ferrari that rolls out of the factory is built with top notch quality and performance. However, there's also the financial side of Ferrari. You find that they always built cars that would target certain group of people and as compared to Lamborghini, Ferrari very much care about the comercial side of car manufacturing and ensuring the cars they built would be sellable and acceptable by most if not all.
However, times are different now. Lamborghini is now under Volkswagon group and you find that nowadays they are looking at the commercial side of making cars and their design is more mainstream while maintaining the same ideology about power. The Murcielago and Gallardo design is simply awesome. So far i've only seen 2 Lamborghini's on the road in my whole life. 1 was in Singapore when i saw a silver Diable and man...i will never forget the exhaust note when it was accelerating away. Only a Lambo could do that. Another one i saw in SS2, it was a yellow Murcielago when i'm sure most of you guys know who's the owner. He was cruising around at low speed, can't really appreciate it when its driving that slow.
However, it doesn't mean i don't like Ferrari's. They're still awesome and i still get excited when i see a Ferrari on the road. My favourite would still be the F360. I've seen a blue F430 in KL but i still kinda like the F360. But of coz the Enzo is beautiful too.