The differences are pictured below
If you had $5,000 laying around, would you rather go for Nidoking or Mewtwo
It's a high cost to pay, but Shark Shredder, Killer Clone is already a 4/4, and if you can pull another high-power creature from your opponent's graveyard, you'll be doing huge damage, justifying the initial cost
Staff of Domination with Metalworker also work for infinite mana if you have 3 or more artifacts in your hand
Remember, and this isn't specific to this card because I haven't read the spoiler yet, but every so often someone will take some cards that look like garbage and turn them into a meta-defining threat so never count something out because you don't see the advantage
And with the double-sleeving process you may get pockets of air in your sleeves that you'll have to squeeze out to decrease the thickness