[The rambling seems to do the trick, diffusing some of Bumblebee's suspicion. His voice is just a little louder than Starscream's rambling. Just to get his attention.]

Just-

[Then Bumblebee silently raises a hand, palm open towards Starscream. It's a gesture motioning for Starscream to give Bumblebee a chance to speak. His voice is softer the second time around.]

Just be careful...

About how you introduce yourself.

[Bumblebee's settled into a calmer state, which sets Vanguard much more at ease. He's no less happy to have all this multi-verse, alternate reality business complicating his life right now. But at least, he's comfortable in admitting this is not the same Starscream as the one he knows. Science and engineering and leaving a 'beneficial scientific legacy']

The bot who shares your name in our world is more interested in power and violent conquest than they are in the 'betterment of Cybertron.'