I think the stadium jersey is a performance jersey,as in meant to wear and play in, assuming that's what the players wear when playing. And the replica jersey is qualitatively speaking at least meant to be worn more as a fan maybe. This is my understanding of it, though I could be wrong
And it's very possible because I read somewhere that the phrase "Alla Juventus vincere non è importante. È l'unica cosa che conta" would be written inside of the collar.
3 golden stars, 1 silver star, the Scudetto patch, the Coppa Italia patch. The stripes with Marchisio #8 on the back. The black with Jovetic #10. DDTS.