Isn't it interesting that both Alexander Galibin and Michael Jayston are relatively tall? Maybe directors just can't force themselves to pick a shorter man to be King. Or the facial requirements are more important.
Galibin's Nicholas doesn't have the degree of charm that the real Nicholas had, I think. Even Kerensky had to admit Nicholas' undeniable charm. Jayston's has more sparkle, but I hate, hate, hate the fact that the movie uses the character of Nicholas to teach all the viewers the backdrop of history. His uncles lecture him about bullets going to Vladivostok, for instance. Now tell me, who knew more about travel from Vladivostok, huh? I get that it is the screenwriters' device to teach all of us, but it greatly reduces the dignity of the man. And intelligence.
So I vote for Romanovy, tho' I agree with Greg King that it is propaganda.