edit: What i'm trying to say is, why is a fully functional car (even with bad crash safety and emissions) cheaper outside the United States than a golf cart is here? The answer seems obvious to me. Making it illegal to import cars has stifled competition and hurt consumers in the US.
Also, you are comparing two different spectrums. Maybe compare against very good farm equipment in Russia?
My farming background says "John Deer == artificially (and insanely) expensive maintenance". I've always equated JD with just being one of the biggest players, not necessarily a reflection of good quality.
You've been fortunate with your tractors. IME, even "quality" brands like Deere and IH often have infuriating issues for which one eventually learns to compensate. It's good to talk to a few people before buying anything. My dad has a guy he always calls who owns a tractor auction, and can be trusted to tell the truth about different models.
Ceteris paribus, I would just get a Kubota.
Because Lada 4x4 has a much higher top speed it is has the potential for much more serious accidents.