My experience with the two in 7.62(and I'm no expert shooter!) is they seem very similar in quality, cost, and performance.
Did have only one FTF with Wolf after thousands of rounds and only shot a few hundred rounds of Tula with no problems.
Overall I think they're both good and definitely more affordable than brass cased.
Who knows some guns might like one over the other so I'd try both.
That is the way I understood it. Wolf doesn't make ammo, they spec and buy from ammo makers. With their .22 rimfire they buy from SK/Laupa, in Germany. Most of their centerfire is Tula. Doesn't mean that Tula can't make a load that in unique to them or that Wolf can't order a special loading that Tula couldn't use. The Wolf Gold series comes from Prvi I believe.