I like both residential designs equally. I think it's safe to say we're going to get some nice res towers from aA. They have consistently good towers when they're working with a quality developer and they're the firm that sees it through to the finish.
The residential towers are the least interesting part of this proposal, regardless of their design. This project is exciting because of the experience at street level (+/- one level), since that's where the public is going to interact with it, and the design for that part of the project will be pretty stunning if it's executed well.
If done well, this has best development of the year written all over it.