For me there is no problem here, there are a lot of differences between Alpha Playtest cards as the cards are different iterations of the same card to test or correct things.
For example you can also point out that 1 colorless energy on the Mewtwo Alpha Playtest card is reversed for no reason (for me it was an error corrected in another iteration of the card):
Btw you can also see a “good quality” and a “poor quality” versions on the Alpha Playtest cards too, but it’s less pronounced.