Overall, I like Def Leppard much better as a band over Bon Jovi. And, I have a soft spot for Hysteria. I remember winning the cassette on the boardwalk at the Jersey Shore after seeing the video for "Women" on MTV in our hotel room during a rainstorm. I had no idea Def Leppard's new album had even come out but I had to have it. I wore that thing out. I even got to see them twice on that tour.
But, comparing the albums, track by track, I have to say Slippery When Wet holds up better. I absolutely hate (always have) "Rocket". "Pour Some Sugar On Me" is way too cheesy. And, a few songs from Hysteria's Side B are kinda throwaway to me ("Don't Shoot Shotgun", "Excitable"). I think "Hysteria" and "Love and Affection" are great ballads. But, they're not enough to topple Slippery When Wet. It would have been a better album if the B-sides had been on the actual album ("Tear It Down", "Ride Into The Sun", "I Want To Be Your Hero").
To me, SWW is just a much more consistent album. In my opinion, "Social Disease" is the weakest song on the album, complete with the Desmond Child horns. As overplayed as they are, "You Give Love A Bad Name" and "Living On A Prayer" are pop rock masterpieces. And, "Wanted Dead Or Alive" is my favorite song they've ever done.