Well then, it sounds like the Autobots are better from the surface level.
How do I know if the Cbertronian race is good and who gives them the right to take over the universe? RIGHT? It sounds like the Autobots will let other societies live as is. It's mighty nice of them to protect those other planets who probably couldn't fight against mech robots that fly around space.
In a lot of versions the Decepticons are trying to expand to find more world for raw energy since the civil war between them and the Autobots bled their world dry of resources leaving it an uninhabitable rock. Both sides wish to see their world restored but have different visions and methods for how to go about it