shouldn't be a surprise that wolf an tul ammo shoot the same since they were the same company till a couple of years ago. You can count brown and silver bear in there with em as well, all the same parent company till about 2 years ago when they parted company. I don't have all the details just recall reading an article about one of them used to be a maker for the other then going on its own an using their name still to sell under since they were in a different soviet block country and litigation however complicated that is in Russia?!
I've shot both Wolf and Tul Ammo in 5.56 and 9mm
both were extremely dirty
both were what I expected for the dirt cheap price
non re-loadable casings dirty primers and crap accuracy
you get what you pay for in life an bullets