How are "Foil" Badges different from common game Badges?

As I understand it, crafting a set of regular Steam Trading Cards gets you a common Game Badge. I also know that it is impossible to use a mix of regular and foil cards to craft a badge. Either you craft them entirely with Foil Cards, or you use no foil cards. (With the former granting you a Foil Badge instead).

Are Foil Badges instead of or in addition to regular badges? If the former, can you mix and match Foil / Regular levels? What happens?


Foil badges are separate from regular badges, and only have one level. Crafting a foil badge will provide 100 Steam XP, the same as a level of the regular badge.

Source: Steam Trading Card Faq "There is no extra benefit to having foil cards or foil badges aside from their rarity."