If the bores are excellent in those Mosins, you would be in for a big surprise. The Mosins you speak of have no description other than receiver type. The Finns had very strict accuracy requirements and after they rebuilt them, the rifles they released were some of the most accurate made in those times.
I have two Finn rebuilds. Both are 91-30s with as new stocks and barrels. They both shoot into slightly over a minute of angle when a shooter with good eyes and experience shoots them with decent ammo. Far to many people judge the accuracy of these old war horses with the cheap and of sometimes questionable quality surplus ammo. Surplus ammo for your M96 Swede has always been in short supply. I bought one batch over 30 years ago and I was lucky to shoot into 5moa with rifles that looked and measured out like they had just come through a fresh FTR. They shot the Dominion 160 grn roundnose into about 2moa and selected handloads much better.
When you take two milsurp rifles in comparable condition inside and out and feed them ammo they like, they will perform almost equally, as long as the shooters are equal.
About ten years ago, we used to attend matches on a regular basis. I liked to pit a couple of milsurps in the open hunting rifle category at 100 yards. Back in the late fifties when scopes were becoming affordable to the average hunter there was a lot of discussion about whether or not scopes were even necessary. I recently sold a 1908 Brazilian Mauser chambered in 7x57 that would regularly shoot into less than a moa at 100yds with selected hand loads. The best two shot group I made with it was 1/2 moa and I still have the target, signed by the other 9 competitors to prove it. The side bets were very good that first round. After that, I couldn't get anyone to even make an offer.
The rifles I took to those matches were the 1908 Brazilian, M91/30 SIG barreled Finn and a 1950 No4 MkI* Long Branch. All three will shoot into sub moa groups if they have ammo they like.
As far as quality goes, I have seen some very roughly finished Swedes. Same goes for Mosins and other milsurps. I have also seen Mosins and Swedes with fit an finish comparable to some of the best quality sporting rifles made.