Shawn Michaels and Sting are two of the best wrestlers in the history of the buisness. I hate to put one of them down but I do believe HBK is better, remember that wrestling would not be the same without HBK or Sting, they've made HUGE impacts for our great sport.
Wrestling skills: As a wrestler HBK. Shawn Michaels is the original high flyer, hes the man who changed wrestling today. Sting did a lot but he didn't have as many great matches as "The Showstopper". HBK has had so many amazing matches with a variety of opponents. He made Diesel, Cena and orton look good, something most people can't do. Do you think Sting can do that? No, he can't. He couldn't put on a good match with a great performer, Samoa Joe. He forgot the finish to the match, something a TRUE legend would never do in my opinion. I mean, you think HBK, Flair, Hart, Sammartino, etc. ever forgot the ending of a match, no they did not.
Mic skills: "The Heart Break Kid grabs this category too. I mean, HBK has charisma like no other man in the history of wrestling. I mean, to me Sting always seems a little uncomfortable on the mic, don't get me wrong hes a great talker, but I don't think he likes to do it. HBK loves to talk and you can see it with his DX promos. I mean, hes so god dam funny.
Impact on wrestling: HBK has made the most impact of anyone in the history of wrestling in my opinion. He, as I mentioned earlier, was the original high flyer. Can you imagine what wrestling would be like without highflyers? No Rey Mysteiro, Evan Bourne, Christian, Rob Van Dam, Daniels, AJ Styles etc. I mean, without highflying wrestling would be immensly different and would not be as popular today.
Also, HBK has made a huge impact on stipulations. He was in the first ladder, Elimination Chamber, Hell In a Cell and the iron man. It was HIS idea to put the roof on the cell, can you imagine what WWE would be without HIAC, I can't.
To sum this up, I think their both great. But HBKs the best of all time.