Well he looks like Bumblebee, he's a Pagani, not a trax. He can do that awesome molecular thingy, and he's actually important to the plot. The End.
Using these images stinger looks like a bumblebee repaint and is skinnier then the vehicon who seems to be a bit more bulky. Also different vehicle modes.
The only thing that is the same is they are both red and both have green battle mask visors/eye ports.
Stinger is a 'one off' production. He isn't mass produced, or so rumors have told, 'cloned' like the Chevy Trax Vehicons appear to be. It also seems his sole purpose is to be a spy and infiltrate areas. This would be a fitting purpose for a fast and sleek Pagani Huayra that can transform into a cube cloud and float about every where! I know you haven't asked but, Galvatron. I believe he is also a 'one off' production. Built to be KSI's 'tank' and main 'unit' to control the rest of the Vehicons and Stinger. I also believe that he is KSI's take on a counterpart for Optimus Prime, look at him. He is a Freightliner Argosy, a rather large truck! They designed and built Galvatron with Optimus in mind.
He's an Autobot A Frontliner Master Swords Mech Courageous Corvette Stingray (or Lambo, depending on universe) And he pretty much shish-ka-bobbed Sideways The Swipe fan in me couldn't resist answering you.
How was black ironhide different to all of the generic black decpticon protoforms? Serriously wtf is going on with these boards?