Don't worry about weight man, only super techy AT guys care much about weight.
I'm kiddin, but it shouldn't be an issue. Bindings will likely make a larger difference than skis. I don't even care that much about weight when I am touring. I'll load up some fat skis with metal Trackers and tour all day, legs are gonna burn but the next time I go out its a breeze.
My best suggestion for the weight difference is to weigh the individual skis. My bet is that since Armada is so big the two skis might not be too closely related in weight compared to ON3P and Moment, who either weigh their skis to pair them or use wood that is pretty much side-by-side in their cores so they are symmetrical. I can tell you that most skis are around 10 pounds a pair...super light touring skis can get close to 5 or 6, but everything else is around the 10 pound range.
Hope this helps you some