From what I have heard, Bix & Lou were close friends.  Any "competition" between the 2 was just a friendly rivally, for screen time and fan letters (some ladies went "ga-ga" over Lou's bulging pecs & biceps, while others tended to lean towards Bill's caring sensativity & looks [although I prefer the ladies myself]).

Doug 



Doug's Incredible Hulk Comic Page
http://www.hulkcomicpage.com