Ordered a set on Amazon and then saw a deal for them on Tinydeals. Waited a while for both, but the Amazon pair came in first. I didn't know what to look for, but they sounded HORRIBLE! Figured they were fake, so contacted the seller and they just refunded me my full amount. If they easily refund you, it's def a fake. Then I got my 'simple packaged' one from TinyDeals (no case/box). It just came in a bag and thought, oh no...not another fake. Then I realized it was a 'simple' package item.
Anyway, other than the case not having the size S,M,L, it's very easy to tell other than the sound, if you have a fake. The fake has all plastic and has no shine on the earbud. The metal mic and metal at the Y connector is very shiny and the grooves are not as fine. It's shorter by about 5 inches. Also, the 'Mi' label is a washed out dirty white, rather than a tan-ish/grey. The TinyDeals one is def legit and they sound great. I don't have anything to compare to, but I have jlab j5s as my beaters and it's more clear. The jlab j5s try too hard with too much bass.
I like the fit, but the cushions don't hold. Worth the $15.