Damn that's some hot vocal work. I really like the organ as well and how it fits the groove. Can't help you out on the mix, it just sounds great to me. Top job
The only thing is to may put reverb with less predelay. This will essentially put thru less output before applying effect but also put like a 2-3ms delay on the verb.
Experiment to put the guy in the same room.
The mix is really nicely done. Sorry to be replying late. Didn't see it before.