The Vapour/Elite shirt is what the players wear. It's made from roughly the same fabric, but is much more fitted and has stick on badges that don't cause friction burns when using it for high intensity activity.
The Stadium shirt is more relaxed, for those of us that look like a pillock in a skin tight shirt. The Stadium shirt actually has stitched on badges that last longer - so the cheaper one is more hard wearing...
I don't dispute football kits/shirts cost significantly more than the sum of their parts. But for the fact it's costed into the kit based on the stupid amount of money Nike give us year on year.
If you look at the Spurs shop at clothing that is not Nike, it's half or less the price.
Sadly this is the world we're in. Where to keep afloat, we have to sell the rights to make our kits to a company like Nike for £xm a year and they can charge what they want in return.
As an example, a Brighton Shirt, made by Nike, is £52 and they only sell the basic version. Nike don't Pay Brighton anywhere near what they pay is, so charge less for the shirts.
Under Armour only occasionally released a pro version of our shirts, for the most part, they only released replicas that weren't the same as the real deal.
It feels like every day I read a post about a kit, it comes from someone trapped in the 60's who don't understand the science or the economics of football kits.