You can't really compare Haye and Murray, can you? Murray is a brilliant tennis player who did his best against someone who is quite simply better than him, and was gracious and honest in defeat. Also, he is comparatively young and will improve.
Haye is an over-hyped fake, full of dubious excuses, a sore (in more ways than one!) loser. His wisest policy now will be to retire. I really hoped he'd be found out, and I'm ever so glad he was. He and some of his so called "fans" were a disgrace. Vladimir Klitschko may not be the most spectacular or charismatic of champions, but he has class and stature, both physically and morally.