Starship Troopers is a very different film than Aliens, though. Superficially they look similar (ill-equipped gung ho marines take on myriads of utterly inhuman enemies), but that's about it. Aliens is about caring more about corporate interests than about human lifes which ultimately backfires. Starship Troopers is a satirical commentary on militarism and propaganda. Aliens does that, too, but it's only in the beginning, and it's not the main focus. The marines, after their initial loss, overcome their machismo and adapt to the situation. It's about humans adapting to fight against inhuman enemies (the aliens and the corporate interests). In Starship Troopers they never learn. There the Mobile Infantry is static and doesn't really learn shit, they just throw more soldiers to die at the front and win only by sheer luck. Where Aliens is about the power of human compassion, Starship Troopers is about the lack of it.
I like Aliens and Starship Troopers for very different reasons.