I think saying all differences are "cosmetic" undersells them a bit.
Sure, having different words for numbers related to different objects doesn't fundamentally break the world, but to someone raised with a concept of a number being a number universally, it's a pretty big conceptual change.
Sure, having different words for numbers related to different objects doesn't fundamentally break the world, but to someone raised with a concept of a number being a number universally, it's a pretty big conceptual change.