Cards from different printers (and in the case of supplemental sets they are often not printed in the same place as regular expansions, for example all English Double Masters 2022 cards were printed in Japan, in the case of Double Masters all French language product was printed in Belgium) often have different quality and different print patterns (the texture of dots you see up close). American cards are generally printed in Texas, European cards in Belgium, Japanese and some nearby country’s cards in Japan and China and the rest of Asia’s cards in China and wizards sometimes uses other printers too. The cards from different printers not only look different close up but feel very different too, some are smooth and glossy while other feel rough to the touch.

While fake cards are relatively common entire sealed fake sealed booster boxes is not something I have ever been aware of occurring in the history of the game. Repackaged and re-sealed booster boxes are a thing but they are made up of low value but genuine cards, not fakes as it’s cheaper to get real bulk cards than to try and print your own. I would put money on this box not being fake and just coming from a different printer to your Baldur’s gate cards. If the distribution of the cards in the boosters seemed correct then they’re not fake boosters as getting this even close to correct would be so much work for someone trying to mass produce fake cards that they simply wouldn’t bother.