Lol. This is funny. Both are military factories that supply arms. Arsenals over the last few years have had several complaints over poor paint/finish quality and bubbling of the paint/finish when being ran hard. Arsenals also come canted sights at times. I get it that those who pay a premium on their AKs say that the more expensive ones are the greatest, but it’s simply not true. I’ve got both an Arsenal (SLR104FR) and a WASR2. Is the Arsenal a nicer looking rifle with more features (folding stock, threaded barrel, muzzle brake,etc.)? Yep. Does my WASR have a canted front sight? Yep. Did the WASR zero? Yes it did, so rifle is fine. Are they both fully functional with zero malfunctions? Yes, they’ve both been flawless. They’re both very accurate. I wouldn’t hesitate to trust either one to defend myself or my family with. The difference? $649. WASR2 was $400 and SLR104FR was $1049, both purchased within a year of each other.
I would offer more info on 7.62 x 39 versions from multiple other sources (including Rob Ski’s review of the WASR), but for that caliber I use my Saiga or Vepr which were purchased when they were filthy cheap. If I was in the market today for AK in 7.62, I would buy a WASR.