I've met both men and liked both of them. They have a lot in common as basketball coaches but as individuals they're different. One isn't "better" than the other or, IMO, more or less likable. Whether a person is simpatico with JC or Geno probably depends on their own personality.
FYI, Geno's aloofness comes from the same place as his brashness - he was a 7 year old non-English speaking immigrant in Philly that needed to learn to protect himself somehow. He picked up the Philly attitude and everything that came with it. Fellow Philadelphian and ND head coach Muffet McGraw summed it up a few months ago, "For people who don't know Philly, the saying is when they don't have anything better to do, they go to the airport and boo bad landings," McGraw said. "I think the Philadelphia coaches are brash and outspoken. I think there's a lot of sarcasm used. I think that's something that even when my team had to deal with it, I'm going to be honest and I'm going to tell you. And I think that's how most of those coaches are."