Great track. You both did a good job but I agree with the other comment about the mixing, it sounds like there's some echoing interfering with the sound which presented a serious issue with Fats' doubletime being coherent. You both came with some solid, heartfelt bars. Teqneek murdered it with multis in his second verse.
The one thing that nagged at me moreso than the mixing was that you both seemed a little aggressive even though you were delivering gentle bars on a gentle beat. Both of you sounded like you could have been scowling and flexing your biceps while you were recording, which was a little disappointing because you both had great bars.