Well... what can I say... the weight/feel of the paper seems legitimate. Both posters feel and roll like the gazillion of other B2 theatrical posters I have. Both have that "smell"... you know what I mean. And both have nicks, creases, dents showing that they've been stored and rolled like any other old theatrical poster. They do not seem to be minty white repros sitting in a plastic sleeve waiting to be plucked off the rack.
Why the Lucky Strikes is 2 cm shorter width-wise, I have no idea. I've reached out to a few dealers in Japan to see if they have any information. If they shed anymore light on the situation, I'll let you know.