Lupe's version isn't done. The first verse sounds like he played around with a particular flow, but cmon, here and there he goes silent for like a bar in his flow. He could probably have killed it too, he gave the beat and chorus to BoB but Lupe is awesome, he could have changed it around.
The reason BoB's version sounds better is it is mixed and finalized. Percussion does a lot for the rhythm and that's probably why you think it sounds more upbeat SiGh.