I have both and will comment. Run of the mill AK rifles are not that accurate compared to AR rifles. I once outshot a Dragunov at 200 yards with a replica rolling block .45-70 rifle! For accuracy, go with a AR-15. For pull it out of the mud and shoot, go with a AK.
Saiga in .223.....a sport version of the AK but with the accuracy that comes with .223. I got one...very happy.