It sounds tight, that's the best I can explain it.
Especially when Bone does it at their best.
"Vocal percussion" maybe a good way of putting it.
Something about them syllables, and harmonies in Bones case, is nice to my ears.
The thing with Layzie is that he just rapped naturally and slower than the rest.
But he flowed with the beat better.
Meanwhile, it's obvious the others were forcing their speed for the song.
And it's obvious with how jarring it is when they did it and how offbeat it sometimes got.
Krayzie is the best to ever do it, though.
Then again, Bizzy is known for doing fast verses in one take.
I'm not sure how common that is with other fast rappers.