Unfortunately, theres no one answer to whether Japanese Pokmon cards are more valuable than English cards
Since you're in Jund colors, you have access to a few more spells and creatures that let you increase the power of your creatures when you attack, letting you put your opponents on the ropes
This is especially relevant to formats like Booster Draft, where following the deck-building rule may not be possible
There are many viable options to play
Depending on the collectors you'd ask, Antiquities actually consists of 100 different cards to collect
It might be borderline impossible to collect a single copy of every Magic: The Gathering card ever printed, much less a playset of every card, but if you've ever wanted to build out a set, like a collection of a specific set, it could be something like a challenge to collectors