There are a few things that Cregga and Asheye have in common.I will now list them.
1. Asheye and Cregga both went blind during battles.
2. Both were badly afflicted by the Bloodwrath.
3. They once ruled Salamandastron.
4. When they grew old,they lived the rest of their seasons at Redwall Abbey.
5. They both were nicknamed because of being heavily afflicted by Bloodwrath.Cregga was called Cregga"Rose Eyes" and Ferlon(Asheye) was nicknamed Asheye.
Those are the similarities between Cregga Rose Eyes and Lord Asheye.