^Nah, it's just, once again, an example of how badly pretty much everyone involved in the production of this film understands the subject material.
Both sides are just grey, indistinct robots. There's very little to tell them apart other than what badge they wear - and one of them wears the other side's.
It's been announced in the last couple of days that the video game for this will be getting downloadable content in the shape of extra characters. One of those is G1 Starscream. I've seen a screenshot and the difference is like night and day. The character design is distinct, it has a certain amount of personality.
Only the racial stereotype twins (Mudflap and Skids) and Prime seem to have any kind of distinct personality about them.