I say it has a completely different execution compared to Django because where Tarantino succeeds is in taking the feeling, the look, the music, the sound and the tropes of old exploitation films, but not the plot. While 'Nazi's from the Moon Attack' necessarily has a 70s exploitation film plot just from the inception, there just isn't enough depth of character to pull it off. Udo Kier is great in his role, although he doesn't get much screen time. Christopher Kirby hams it up, and not in a good way; any time he is on screen, I quickly lose interest. The action set pieces are predictable and, at times a little boring, and the dialogue lacks creativity.
Where the film finds some success is in the gags about current world politics. The Sarah Palin expy president, played by Stephanie Paul has her moments, but is altogether too heavy-handed. In a movie about space Nazi's, the trick really should have been subtly in other areas. I'm disappointed in Iron Sky more than anything because, with better execution, we could have had a romping good cult classic of sci-fi comedy action. Instead, it's a rather bland and slightly immature action flick based on a bizarre concept, and will not stand the test of time.