Obviously the edges are rough, as they are taken from crappy scanned photos. But the thing is they have been put together with some thought. The lava stuff is pretty cool.
The other one is just meant to look weird. The more I look at it the more I hate it. The Episode II one was kinda lame too, Padme and Anakin side by side and a red lightsaber. They can do so much better having access to high res. images and official stuff. I mean come on, you barely see anakin.
Did I say I think the poster is way cool ?! Guess I did yeah .. Sometimes, I think people just love bashing anything that can be bashed .. and bashing Lucas for what he has done with Eps 1-3 has become a sport for some .. go Lucas and Star Wars!!