Belorion, on 17 August 2013 - 05:05 AM, said:

It's the legs. Turn the battlepod's legs around so that it has human knees instead of being a chickenwalker and they're pretty much the same thing, particularly the feet. Take a look at the Ostscout for example:

Or the Ostsol. It even has the circular "viewport" in the center of the torso and the four "antenna" lasers. Slap a couple of arms and a head on a battlepod and you begin to see the similarity.

As for the Ostroc... Well, this was the Ostroc Mk. II from the original Battledroids edition of Battletech.

So that's why they're considered Macross designs. Of course, they (apart from the Mk II which was never seen again outside of Battledroids) are far less similar than the more popular Marauder, Warhammer, Crusader, Phoenix Hawk, Stinger, Wasp and so on, but probably still enough that HG would see the potential for lawsuit dollars if someone tried to use the original TR images.