At +3X the price of the Sako over the Milspec, the components, workmanship, and quality is expected to be superior! Performance/price=value
Might consider getting the TRG for the deal it is and then get a cheap Savage 6.5 Creedmoor or 308 for a plinking and training rifle.
Well, I have green blood flowing through my veins, I have shot a 5r, in 308, and sls shot a friends TRG, about ten years ago, and I gotta admit, i had a really tough time putting it down. It's a classy rifle, its actually in a class of its own, and it pains me to say this, but on both, at their best, my vote goes to the Sako. That thing just ROCKS, and cleans, like no other barrel I've ever cleaned, except my Sako 75, that I had a few years ago.
Tough vote, TRG! GO for it!
I wouldn't classify them as a "run of the mill" Remington 700, and would not throw them into the same bucket. The barrels/chamber are handled independently from the standard fare 700's.
I have a Mispec 5R that is about 15 years old and it will still shoot ragged holes.