They weigh the same, they have the same spool size, they both have the same gearing and braking system. Caenan has the new stable spool, and Caius has the old (but dependable) Free Spool. I would ultimately go with the Caenan because it has a 7.2:1 gear ratio (although it's right hand only). If you're buying on Amazon, I picked up my Casitas for $90 and change, so that would be in the price range of the other two. This is probably blasphemy as a Shimano guy, but I keep hearing good things about Daiwa's new Fuego CT and would recommend giving it a shot.
GET THE NET