It's very easy to wind up drawing 2, 3, 4 cards per enchantment with all of the Mesa Enchantress effects in these decks which results in a hand with a bunch of extra lands, and putting then directly into play can offer massive ramp potential
They often feature art from prominent Japanese artists, like Liliana, Dreadhorde General, whose alternate art was done by Yoshitaka Amano of Final Fantasy fame
Heck, even my 60 card decks only ran like 20-22 lands while my Average Mana Value was like 3.75+
Unless youre aiming for a specific deck strategy, you want to diversify the types of Pokmon in your deck
Its not sure yet whether these are print run differences, or factory differences (perhaps even from different countries), but there seems to be three versions available for each of the Base Set Commons, Uncommons, and Energies: Semi-Glossy Matte Matte with Semi-Glossy Borders When you look at the image above: the top card is the third variations