Not having played Alien in a bit, which I am displeased to admit, but it's roughly the same. It recommends more "Young Blood" cards per deck per player, scaled up only for the second and third minidecks. I believe the Alien game only wants the same number added to each deck based on players.
UPDATE!:
My 2 friends and I played the Predator movie game tonight. We actually, by the skin of our teeth, won. We did it. We "Got to the Choppa!"
We each were within 1 damage point from death. We were just able to coordinate and draw high power cards to keep the Wilds from getting full and pushing enemies into the combat zone.
Next week, we play Predator 2 and I can't wait!