Ya. I think you're right. I should see if I can find those posters I have them both but they've been in storage for decades now; and that image probably appears on the cover of the 2nd issue, iirc, or otherwise somewhere inside the 2nd issue.
Once again, yes. To my knowledge, there were only 2 issues - but the US printings and the UK printings had some design changes. Not sure how extensive, though. I doubt the image and text content were any different but I know there was definitely some layout design aterations made. Certainly, the price printed on them differed - that's for sure. lol.
Also, there's this.
Oooooh... Sooo beewtifahl! *SQUEEE!!!*
EDiT:
Here's the UK editions of the 1st and 2nd posters:
I'm absolutely certain the US variant editions use a red ALIEN title banner instead of a green one.
-Windebieste.