95A-100A Urethane Is a limited edition urethane slightly softer than the standard 105A.  Slightly more grip and squeak.
105A Urethane is somewhat hard and grippy with great squeak.  It is close to 65D.
60D Urethane is a softer transparent urethane with more grip and squeak.  It's a limited special wheel that requires a special shape to lock the bearing tight.
70D Urethane is a hard urethane plastic.  Less grip and some squeak.