Why should you need to tell them apart? Why have two different keys at all? A single key for a single car. I can't believe it took GM until the 1990's to fix that ergonomic fail. And, they held onto the dual key setup despite customer preference:
GM issues one key that operates the doors and trunk, and a second key for the ignition, despite research indicating that customers prefer a single key.
Toyota had single keys that could be inserted either way since the 1970's. VW, at least since the 1980's (my '84 Rabbit had a single symmetric key). GM / Ford held on to the dual key setup for decades.![]()










and will kindly remind you to retract them as your passenger exits the vehicle. I didn't think of it until you mentioned it because I'm almost never a passenger. But, seriously, I'm surprised ours haven't broken yet. 





