There's a lot of different ways it can hurt. Are you getting saddle sores? Are you sitting on soft tissue rather than your sit bones?

Not everyone can ride the same saddle. We're all built differently, so our bodies need different shapes. Even if two people need the same basic shape, they don't always need the exact same saddle.

There's a whole subforum for Favorite Saddles and another for the evil ones that hurt. Start poking around in there and see if anything rings a bell