What's the difference between A and B?

Cold Heart (PNAU Remix)

Kill Bill X Counting Stars

Unwritten

When You're Gone

Austin (Boots Stop Workin')

Someday

Too Sweet

Secrets (feat. Lindsey Buckingham & Mick Fleetwood)

Circles

Pink Pony Club

Green Light

Diamonds

Cool Kids

How Long (From"Euphoria" An HBO Original Series)