There's no gameplay balance - and if the two sets were designed to be played like this anyway, then the act of splitting them up makes little to no sense
Charizard Holofoil Set: Skyridge Market Price: $1,544.91 (via PriceCharting.com) A card so rare that TCGPlayer doesnt even have data related to its sale price though the most recent ones top out at over $3,000, to be fair this is the most valuable Charizard card of all time
You can open non-foil versions of these cards in Collector Boosters
Scarlet & VioletPaldean Fates Elite Trainer Box (available January 26, 2024): I ncludes nine Scarlet & VioletPaldean Fates booster packs, one Shiny illustration rare promo card featuring Mimikyu and various gameplay accessories
UC (Uncommon) A little harder to find
No other ink has access to this quality (or quantity) of card draw, making amethyst the go-to ink for control shells