ive never heard of a Zastava.
that in itself would take it off my buy list.
Ruger on the other hand you can buy anywhere and get parts for anywhere and buy after market anything for, pretty much anywhere.
i picked up a ruger american rimefire when they came out and ive been nothing but happy with it.
infact i take it out more then my Savage BTVSS that cost almost double what the ruger cost me.
the fact that it runs any and all the aftermarket ruger mags is a massive bonus.
if you dont like the plastic stock, which ill be the first to admit i prefer wood, but if you dont like it Boyd's makes a wood for $90 that looks boss.
that said i thought for sure id replace the plastic stock for a wood but i still have the plastic one on there and its been good.
ive even had it out below -30 with no problems.
but like i said, ive never heard of or shot the other one so i cant give an opinion on it, but if QC is a worry for you id say go check them both out in person if you can.
mine is excellent and ive no complaints, nor have a heard of any.