You might want to look at the philosophical differences between Airbus and Boeing - independent side stick vs. linked control columns, non-moving vs. moving autothrottles, envelope protection vs. letting the pilot do what he wants (although A320 vs. 737 wouldn't be very valid - A330 vs. 777 would be better since they were developed in the same time frame and technology).
Heck, there is treasure-trove of data and opinions right here on PPRuNe
