Quick, Simple and no shit...

Punches - B.I,Cata had alot, but B.I's came alot harder

Flow - B.I, obviously...
Personals - B.I, his personals were like one word... ILL
Structure - B.I... obviously, some of other cats bars were stretched
Originality - B.I, personals are more original, because obviously they've never been done, unless the person always gets merked...
Vocab - Cata, jsut had a bit more better vocab...

All Up - Over-All, despite my break-down this was a very close battle, punches came every-where from Cata, but some were played, and seemed forced, and the personals that came from B.I were ill as fuck. He also took flow and structure easily...
So over-all i think B.I took this with harder punches, dope personals, good structure and better flow...

My Vote = B.I.Detained