Quoting CEO Luiz Camargo
I can't decide which one is my favorite... The only thing I know is that I'd not dare to face a swarm of these in battle!
The decision for me is a bit easier because I can look up their stats! :) I would post them, but it's a bit tedious when there are 6 variants. Visually I would say that the dark blue or the green would be my favorites.