Apparently the "authentic" ones are made with the same high tech fabric as wot the players wear, so they are suitable to wear for sport, whereas the "stadium" edition is made to look like the player shirt but uses cheaper fabric as it's just a comfortable display version of the shirt.
Although when you look at the
Nike website...
The authentic has:
- Nike Dri_fit ADV Technology combining moisture wicking fabric with advanced engineering and features to help you stay dry and comfortable
- 100% polyester
- Machine wash
Whereas the stadium is much simpler, only having:-
- Nike Dri_fit ADV Technology moves sweat away from your skin for quicker evaporation helping you stay dry and comfortable
- 100% polyester
- Machine wash
I looked further, and it seems a bit more complicated. So the authentic has more tiny holes and has a sleeker design for field play. The replica or stadium version is a relaxed fit with fewer holes. The authentic badges are heat transfer whilst the stadium are embroidered.
So essentially you pay less for more fabric and better badges! Perfectly logical!!