Both let you leave the wallet at home, but they do it in opposite ways. A wallet case keeps cards on the Galaxy Z Flip 8 itself; a holster keeps them in a separate belt pouch. Here's which suits you.
Wallet case: everything on the phone
The Galaxy Z Flip 8 Wallet Case with Card Holder and Ring Stand keeps a couple of cards behind the shell and adds a rotating ring stand. One grab gets your phone and your cards — but it adds some thickness.
Holster: cards off the phone
The Galaxy Z Flip 8 Holster Pouch with Belt Clip keeps the phone slim in hand and holds cards in a carbon-fiber leather pouch on your belt. Great if you hate pocket bulk.
Which to pick
Choose the wallet case if you want cards and phone in one grab and don't mind added thickness. Choose the holster if you want the Flip 8 slim in hand with cards on your hip. Both are cut for the Flip 8. See the Galaxy Z Flip 8 Cases collection or call 978-797-0223.