The difference is that Logan's Run did an excellent job with their characters.
The Abrams movie actors did the opposite.
I dunno, I wouldn't harsh on the actors: they very clearly dig their characters and want to do a good job and sell the heck of what they're working with. I'd actually love to see Pine's Kirk in something less pulpy; inhabiting the role of Kirk without doing a Shatner impression but still making the character recognizable is no mean feat, and he largely pulls it off. For me it's more a question how the characters are written.