Sheen vs. Mirror Holofoil

I was looking at the reprint EX description in the battle decks. Bulbapedia makes the distinction that the EX reprints are Sheen holofoil vs Mirror holofoil in their respective sets. What is the difference. I looked at my Moltres EX from the battle deck and compared it to Articuno and Zapdos I pulled from Plasma Storm. As far as I could tell the reflection runs anguler to the card vs. verical in the set cards, but I dont have a pack pulled Moltres to compare…

Interesting. Does PSA recognize the difference with EX reprints? I can think of at least 9 cards this would apply to.