missile 1 has an accuracy of 80% and a range of 100 miles at £1,000,000 per unit
missile 2 has an accuracy of 78% and a range of 95 miles at 75,000 per unit
Phalanx has to go for number 1 because the superior performance is vital
National Military would be more likely to go for missile 2 because although its performance is slightly inferior its cost per unit is vastly better and they have better infrastructure to mass launch
This makes no sense, if in game I was allowed to buy and deploy option 2, I would totally spam that SAM all over the globe and the UFOs would be failing from the sky like rain.
I feel that this and the phalanx being super secret thing, and how its squad of eight soldiers that take so many hours to deploy are the ONLY counter to the alien attacks... all of these unbelievable elements are part of the same problem. That problem is the plot seems to favor hyping up Phalanx to be hollywood-style-cool so that the player feels important in his power fantasy, instead of giving it a realistic and believable role that does no harm to the game-play and potentially improves it.
Realistically speaking it only makes sense for Phalanx to be completely research-driven. There is nothing much destruction-wise that 8 soldiers flown in via scram-jet can do that 800 local soldiers couldn't. Especially since the latter has the advantage of heavy equipment like a couple dozen AFVs and attack aircraft. But the advantage to the lighter touch could be in capturing biological and technological specimens and bringing them back to isolated facilities for investigation. As well as conducting small scale field testing of new weapon systems on the threat, so that national militaries can adopt the winning systems on a large scale in preparation for a feared invasion.