This idea of checking out the number of "known problems" on a brand is not a bad one, but when looking at the number of them alone, especially one like RAD who has been selling thousands and thousands of bikes for years, and comparing that number to a relatively unknown company, well, I find any comparison a huge stretch. It would only make sense that RAD would have MANY more complaints. They have sold WAY WAY more bikes....
That said, I'm looking at the ncm moscow from leoncycles on their website, and the first 2 things I see would both be show stoppers for me. The first is the picture of the motor - which is clearly marked 250 watts. That, and it's an off-brand motor. Then there's the kickstand, which has been located in a position where the bike can only be pulled back a foot or 2. There's very little patience on my part for idiotic engineering like that, especially when the rest of the world has moved to designs where fouling the kickstand with a pedal is impossible.