They are both 1/1 creatures for one mana that can prevent combat damage by being sacrificed
Diancie will likely get a small event in Z-A, like Shaymin and Darkrai did in Legends: Arceus and despite how limited Diancie has been, it is popular, and soon it will get a chance to shine again
Leaks and official teases by way of The Pokmon Company International as well as Japanese releases have already confirmed several major Mega Evolutions in this set, including: Mega Mewtwo X Mega Mewtwo Y Mega Lucario Mega Banette These four are expected to headline the English set, which will likely pull directly from the Japanese Night Wanderer expansion
Paldean Fates Explore cards from Paldean Fates, view the set details, and try a simulated pack opening from this expansion
However, there are tradeoffs too - spreading yourself across more than one store can be time-consuming and fiddly, plus this dilutes your ability to build up a good seller reputation
The highest peak for this Booster Box was just over $320, meaning that while the set isn't sitting at its highest value, it has retained and grown in value for most of its time on the market
