Hmmm..I'm having a hard time deciding...
Cody (RB) was loving and smart but so is Logan. I think Logan is a bit more "needy" because of her past circumstances, and just maybe my training skills are better too... (doubtful)

The main difference is that Cody was the "pee* king , and loved water, whereas, Logan has amazing bladder control and isn't crazy about water.

Like people, I think every animal has their own special personality.