It's been an interesting experience creating this collection. Each car has it's own personality. The two Porsche's are a little similar to each other but the Cayman is stiffer. The BMW's couldn't be much different from each other but I love them both. The 335 is pretty highly modified and is the fastest car I have ever owned. The Z4M with the S54 engine is a joy with it's naturally aspirated motor and dialed chassis. The hood seems very long on the Z4 and I feel like I am sitting on the back wheels. The Boxster feels more like I am sitting WAY up front comparatively. I have to say the one thing the Porsche's have in spades is the sweetest engine note I have ever heard, particularly at high RPM's.