Same hobby. Different words.

Fortnite is the official spelling. “Fortnight cards” and “Fortnite trading cars” are common search mistakes; they lead to the same collecting basics here.

Trading cards are collectible cards. A sticker album is a different product; check whether a listing offers cards or stickers.

Keep printed finish and product names when searching: Holofoil, Optichrome, Crystal Shard, Cracked Ice, Laser, Hobby, Mega and Blaster.