The autobots and decepticons have two clear distinction in that decepticons looks way more powerful and evil than autobots, which makes them cooler. However, the other characteristic that divides the two groups are their eye colors.
Autobot are blue.
Decepticons are red.
Then will someone explain to me why Frenzy's eyes are blue? Maybe he used to be an autobot until he decided live in Barricade's trunk? I hope this can be that can be cleared in the TF2.