depends on "which" polish barrel you are talking about.
some of the ak-47 bbls. were shot to shit. matter of fact, 75% of the ones i've looked at were shot out.
the akm bbls. are about a 50/50 shot...and there are some out there that are like new.
if you can find a new polish bbl., it will be the equal of any.
the hungarian rifles shoot nicely enough, but i have not seen hungarian bbls. for sale.
when it comes to kalashnikov bbls, i pretty much grade them all equally and go by individual condition. overall, i wouldn't rate one above the other. both are equally good, imo.