I own a Tikka T3 Lite and have owned a number of Sakos including 75 and after reading the comparison using the link provided here, I would not hesitate to look carefully at the A7.
Three of the features that would attract my attention are:
1. Weaver type bases - much less expensive for rings
2. Able to unload the chamber with the safety on - big safety factor
3. Easily adjustable trigger pull.
The rest of features as compared to the Tikka would not be a big factor for me.
My Tikka T3 Lite in 300 WM is my favorite moose rifle but if I had to do it again, I would seriously consider the A7, with the difference in price and weight, big factors.
Duke1