Blade Runner has Pris and Batty, Prometheus has David, who I think is more interesting than them. The first five or ten minutes of the film when it's just David's life on the ship, trying to learn human behavior, is brilliant.

And just like Blade Runner, it's a film about identity and humanity. What does it mean to be human and where did we come from? And for David, this takes an extra twist in that he is not human, tries to be human, but ultimately goes beyond his flesh and blood counterparts who treat him as a tool.

Prometheus has almost no science to it, I'll give you that. But it was never really trying to. The life-cycle of the alien substance is biologically plausible and interesting, and that's about all the science there is to the film. Much like Blade Runner, actually, which shows science but never really explains how it works or anything (the Tyrel speech excepted). Again, that's because it is about ideas and themes more than plot and character, which are really just vehicles used to convey those ideas. I mean, who is Deckard? No, who is he? What are his interests, where did he come from, who is really inside? We never get any glimpse, his dialogue is mainly about the plot, and Ford played it pretty interior/deadpan. We get some hints here and there, and his performance has charm because it is Harrison Ford, but he is barely developed as a character, and other characters like Gaff are developed so subtly that it takes multiple viewings to realize there was any character motivation there at all. When you stack it against Prometheus' Vickers, David, and the performance of Noomi Rapace, I think we are on pretty equal ground.

And Blade Runner has had two directors cuts, by the way. The theatrical cut looks nice, but it's not the greatest film ever made, and it's bad in some places. Prometheus felt a bit rushed in places, but Scott is also working on a directors cut, so I think it's better to compare apples to apples for now.