Like I said, multiple versions.

By the end of Arc One, characters were introduced, changed, and became more, than they once were. Successive pictures will help to illustrate that.

Back Row, Left to Right:
Scavenger (Out of the Past, 1-52)
Vector Prime (Recovery, 6-52)
Optimus Prime (Out of the Past, 1-52)
Red Alert (Out of the Past, 1-52)

Middle Row, Left to Right:
Smokescreen/Hoist (Out of the Past, 1-52, upgraded Revelations, 12-52)
Hot Shot (Out of the Past, 1-52, upgraded Revelations, 12-52)
Blurr (Out of the Past, 1-52)

Front Row, Left to Right:
Liftor (Profit and Loss, 5-52)
Refute (Profit and Loss, 5-52)
Rollbar (Out of the Past, 1-52)
Safeguard (Forging Excalibur, 9-52)
Jolt (Out of the Past, 1-52)
Sparkplug (Out of the Past, 1-52)
Over-Run (Forging Excalibur, 9-52)
Incinerator (Changing Lanes, 7-52)
Longarm (Profit and Loss, 5-52)