The facelifted Cayman wasn’t the only 2016MY Porsche prototype that our friend Andor snapped on his camera in Monaco the other day; he also photographed a pair of 911 testers.

Both cars were black 911 convertibles and if it weren’t for the different color alloy wheels, casual bystanders probably wouldn’t be able tell them apart. That doesn’t mean the differences aren’t there, just that they aren’t visible to the untrained eye.

Genuine car enthusiasts and generally people with a knack for spotting details will easily find the cues that separate the two cars, but the big question is, can you tell us which specific versions of the Porsche 911 facelift were spied here?

You can refer to the cars with the four last digits of their license plates (9201 and 7868).

Thanks to Andor for the scoop!

Photo Gallery