The difference between all of them is negotiable, find one that works and stick with it. Just remember it's an SKS.. not a M70 Winchester, a M96 Swede, a K31 Swiss or a M39 Mosin.
Some will swear on the good book with the domestic stuff like it is 'da bomb, that fine if you reload or are deathly afraid of corrosive primers. One has nothing to fear from corrosive primers, just clean it right.
Yugo m67 and Golden Tiger are toted as the best or at least a favorite, I like the Yugo, it has strippers usually, and it's corrosive. About the closest you can find to match ammo, would be, I guess Lapua, very difficult to find, and it's holy crap expensive when you do find it.
The Wolfs, Bears, Norinco, MFS, Red Army Standard, Barnual, WPA, Poly Performance, Arsenal, S&B, Fiocchi, Prvi, will all go bang, and cut a .310 hole in the target.
Find one you particular rifle likes, and practice.