I wasn't crazy impressed with Kendrick's. I gotta listen to it again, that's how Kendrick's lyrics are for me anyway--dense, and I'm kinda slow I guess. I definitely wasn't blown away by J.Cole's either till' like 3 minutes into the song, then he started gassing'.
It's a good bait though, if they're really gonna do a joint project. Two of the most elite rappers out right now, that could be the same reason a project by them could be a huge disappointment too.
a kendrick/cole album would be 10X better than that future and drake bullshit, and I listen to Drake.