You might just need to lower the saddle a bit or make sure the nose is level.

The Affinity is actually not a bad saddle. It is available with less cushioning, if that is the problem but the size/shape is good.

The Selle San Marco Aspide Glamour is the same size and shape as the Affinity 155mm, and it's much harder.

I've heard they're getting rid of/changing the regular Inform, although I haven't been able to confirm that.