This is true, but the insect one can crawl around on the floor also and get run over by a car, and still be pretty much less conspicuous.
I know they have physical differences, but I'm saying I don't think those differences are significant enough. If you can provide more examples of why you think they ARE significant enough (ideally ones where the fly-spy isn't just better all the time, because right now I think it is and the ONLY reason to get the hoverball is if you want the explosive addon) then I would really appreciate it... perhaps my creativity is just lacking here.
I haven't yet played my Rigger, but I have one made ready for a friend to play the game, so I have been thinking about the uses of various drones. But, lets say you have both of them.
Tight Spaces: I would imagine that the wingspan of the Fly-Spy is wider than the Eye, so the Flying Eye can fit through smaller holes.
Getting into position: Say you are on a roof, and you want to quickly, stealthily get a drone down to the ground.. roll a Flying Eye down a rain gutter. Probably more convenient than flying a fly-spy down.
Yeah, it's not much, but ultimately, the choice between the two is situational. And if you only have one of them, you will definitely find uses for the one you have. But if you have both of them, you never know when one or the other might actually prove better for the job. Sure, they both have the same stats, same body, same speed. But the difference in their shape can definitely spawn differences in which one you really should use for any particular operation.
And no forgetting that the Eyes have the smoke/flashbang. That right there makes them much more useful in certain situations than the Fly-Spies.. If your Fly-Spy is noticed, they crush it and run out to look for intruders, or whatever.. but if they notice the Flying Eye setting down in a corner, you just pop the flashbang for a momentary distraction so you can haul ass out of wherever you are hiding (if you are hiding nearby, and using the drone for surveillance).