Starscream's lip curls up a bit at the first part. He'll neither confirm or deny it. He really doesn't consider either of them a threat. An obstacle? Sure. But a threat? No. Megatron is a threat. The Autobots can be threats. But at least with 'Starscream' he already knows a thing or two.

"I don't think so. That's too drastic of a body change for me. And I hope not, but so far that I've seen, no." He pauses thoughtfully before continuing, "Though the one ... the Autobot one seems familiar. Minus the whole weird Autobot thing. What's up with that? He fall into a magic well of goodguyness or something?"