Japanese, Koreans and people from Northern China all look pretty much alike.
I find the statement by the head of Sony that Sony did not "cave" to be at least as ridiculous as North Korean propaganda.
The first Kim, Kim Il Sung was a giant among Koreans, he was quite huge. Kim Il Sung was quite a bit shorter, and Kim Jong Un is sort of a runt.
The statues of the first two Kims are about the same size, though.
The idea to make this film was stupid. What has happened was predictable. North Korea is better at hacking than Sony is at picking winning ideas for a film.