Board Thread:Speculation House/@comment-226878-20140806000834/@comment-226878-20140807074310

The "bigger guns" theory is definitely a workable one. The Spider Droid had a larger frame and four powerful legs to increase its integrity when firing massive and powerful weaponry. The androids aren't privy to such luxuries so their weaponry is strictly infantry-grade. It's possible these newer models are like a heavy trooper class wielding weaponry with greater recoil and higher rate of knockback. Maybe their weapons are rail guns.