Also the favorite victom and worst enemy are done a little different in ABR. It is calculated over all time. Compared to ea's only being per round.
You kill playerA 5 times this round and 5 times next round. You also kill playerB 6 times this round and 2 times next round. In EA's stats it would put favorite victom as playerB with kills 6 while on ABR it would put playerA with kills 10.
I hope I explained that alright.
I thought this way of doing it was better then EA's so I programmed it into the stats parsing. If enough players want it EA's way, it could be changed back but most I have talked to prefer it this way.