Good point on the drops pod, they were individual pods, but the concept is the same, I will give Starship Troopers that one 🙂. The reason I say Tau Battlesuits is because the MI armour provides the strength/toughness like the Tau it's very much the suit providing the oomph. Where's as with Astartes it more a case of it the armour carrying it own weight (all be it with a bit of increased performance) and the strength and power is mainly the Astarte's own.
I do get where you are coming from though.