Understanding the Barcelona Tourist Cards

First time visitors to Barcelona might not know that there are two different cards to help save you time and money. In this video I'll go over the main differences between them, and provide some lessons learned about how to best use them.
To purchase either of the cards, go to tickets.visitbarcelona.com

[@GizmoGuy620]

Doesn't the Barcelona card have unlimited free travel by bus, metro, (airport-)train (as per the website). Why buy a separate subway card?

[@etops.flight]

The T-casual for Zone 1, currently €11.35 online for 10 journeys looks to be way more value than the Hola Barcelona cards. Only advantage of the Hola, is it allows travel on the airport metro. I’m arriving into town from Madrid by rail and leaving by air but with a lot of luggage so will be taking the train from Sants Station. Even if I buy 20 journeys for 4 full days exploring, it’s still cheaper than the 48H Hola.

[@ItsYashu]

Hello, 1 question , My hotel is at Holiday in molins de rei (zone 2) I have bought Hola barcelona card to use metro etc for in barcelona do I have to buy T- familiar card for 2 zones to go in and out and rest I can use my barcelona card ?