The IL-62 is a surprisingly reliable if noisy and short-legged aircraft - good enough that a number of Western operators bought them as well as the Japanese (which should tell you something). However, North Korea’s IL-62s haven’t been maintained by Russians or any first/second world country. They’ve been maintained by North Koreans using North Korean resources.
Whether something Russian and complex that was maintained by North Koreans out of local resources is worse than something simple and designed by North Koreans and maintained by North Koreans is, as I said before, something I leave up to you. :D
I’ll stick with something built and maintained in first world countries. :)