Just in case you're not familiar with the concept, a Battle Pass like this one offers a level-based set of unlockable items that you earn through playing. When you reach a new level in the Battle Pass, various items unlock and you permanently own them — but if you don't unlock items during the season, they disappear forever.
As you see above, there are two different flavors of "Apex Legends" Battle Pass to buy:
1. The standard Battle Pass (what most people should buy).
2. The Battle Pass Bundle (only if you're feeling especially spendy).
The difference between the two is simple — if you buy the standard one, for $9.50, you'll get access to the vast swath of content that can be earned through play. But if you spend 2,800 Apex Coins ($28!) for the bundle, you'll immediately unlock the first 25 levels of the Battle Pass — and the sweet, sweet swag therein.
Additionally, with the bundle option, you get three exclusive character skins.
Let me be all the way clear: You do not need to buy the more expensive version of the Battle Pass. Unless you're arriving to the Pass late in the season, and you're trying to jump a bunch of levels to make up for lost time, there is no reason to buy the more expensive version.