That is a tough question. I drive a Porsche 911, air-cooled of course, since the water cooled 996 is the equivalent of a quartz watch for me. Like a quartz watch, the 996 does things quite well, but has no character. Most die-hard 911 guys agree with me. But I have always felt that the best comparison is probably the Rolex being the Mercedes and Omega being the BMW. Then Patek, Audemars Piguet and Vacheron Constanti being the Rolls, Bentley and Aston Martin in no particular order. Maybe the closest to Porsche being IWC. It's even made in the German speaking part of Switzerland and marketed with an engineering theme like Porsche. Oh, I almost forgot Breiling. To me it is the Corvette. It performs well and is tacky like a Vette. Just go to their website and look at the pictures of American fighter jets. Maybe it's just me, but an European watch manufacturer would be better served by having Tornados and Eurofighters in it's website. But not many things about Breitling make sense to me anyway. Why Rolex and Omega being the Mercedes and BMW? Because their products and product change philosophy are quite alike. Even though Mercedes and BMW are becoming quite asian in their design philosophy as of late. But what car manufacturer isn't? That's why I only drive classic european cars. Rolex and Omega products seldom change(unfortunately only the watches), are the workhorses of luxury watches, are both built like tanks, and while some owners can be tacky, the products by themselves are not. While being a 911, Rolex and Omega fanatic I would love to view the Omega as a Porsche, I find that it, along with Rolex, fits better in the Mercedes/BMW category.
