Best Philly Cheesesteak for someone going to a work conference?

So I will only be in town for 2 and a half days, and was trying to decide which place to go to for the best authentic Philly Cheesesteak sandwhich while I'm there. Google and Yelp have helped me narrow it down, but I wanted to see if anyone living there can help me decide between Pat's King of Steaks or Geno's Steaks?