I think the obvious difference in design (other than Motorola quality) is the cable splits near the connector, so only one cable goes down the sleeve the other goes straight up to the ear. On yours it looks like the ear piece also comes back from the PTT box, which would limit length and placement or movement, but not on mine.
I made an adapter for the plug, but the impedance is way off so it doesn't work. It was like $275 new (company paid), so I still have it and only use it at work. Someday I'll get one for my HT. They are a hassle to put on or if you have to fiddle with the radio, but great for basic com in a suit. Most of the time a hand mic with ear bud plug works best, easiest to fiddle with and take on/off.
BTW, I also got mine for working on a show. Corporate event. I work in audio, so I'm the guy handing out the radio's at events. I decide who gets the ear pieces or just a plain HT.
"Victory awaits him who has everything in order, luck people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck"- The South Pole, Roald Amundsen - 1912