ORIGINAL: James B
There is no way to predict accuracy by brand name. You will find very accurate rifles in every brand just as you can find poor shooters in every band. Even two sako rifles may not show the same level of accuracy. Both brands in question here are known for pretty darn good accuracy.
I agree with James B, but I will add that, of my friends that own and shoot both brands, they have better out of the box accuracy out of their Sakos. I have a friend who is a former Browning rep, and Browning rifles are all that he shoots. He will be the first to tell anyone that only one out of three Abolts perform "to his expectations" out of the box, and he owns MANY Abolts.