As an owner of both (civilan versions) I can say I prefer the M-16. Take a 15K acre state park, fence it in, give me a cabin and him a cabin and give both of us supplies. Then say one of us gets an AK and the other an M-16 and that I get to pick first, I’ll pick the M-16. I know it’s limitations but if I see him at 200 yds, the game is over.
That really depends on the AK in question. I haven't seen any chambered in 7.62x39 that could hold a candle to the AR for accuracy, but the ones in other calibers, (particularly the 5.56), often do quite well. I've got two in 5.56 that will shoot 2 MOA and one in .308 that will do 3. My old Mak90 on the other hand was lucky to shoot 6 MOA.
My son owes his hide to the limitations of the AK-47, having live through an ambush with unfrienleies armed with them.