They are both good dependable guns. The Tikka has more plastic but it's tough stuff.
I think you should handle both and just pick the one that feels best to you.
PS
Look at the scope mounting system of both and what mounts are available.
Tikka and Sako both have optilock systems available for them but they take different units. Don't judge Tikka's mount system by the "free" ring/base integral unit provided with the rifles. Most with any experience with rifles and scopes toss those in a drawer or the trash and go out and buy Warne's or Talley's. The free rings are more useable if one buys decent screws for them. The ones provided are too soft.
