I own MACH 10, and have recently bought a pair of MACH 60. I realized that while the left piece indicates the model, the right one doesn't. Is there a way to tell them apart?
Edit: Is there a way to tell them apart visually
Yes, but it's slightly challenging. Each model has the serial number laser etched on the stem of the earphone. It is incredibly small but you can probably read it with a bit of magnification (it might work with a zoomed in cell phone pic).
One of my biggest design regrets was not identifying the model on both earpieces. It's not an issue if you only own one model, but it's problem if you own two.