This is the first that I’ve heard the nomenclature of a “Living Card Game”, but it seems to me to improve on CCGs in every way, shape and form:
You have your customizable deck of cards that you make beforehand, before you play. It has the same type of strategy elements that you would find, the depth of play, in that every game plays out differently, the same strategy.
They differ in the fact that it’s not collectible. You know what you’re going to buy in the packages that you buy. You don’t have to chase cards to build decks. You can play with the cards that you want to play with.
Post-Dominion though, I’m not entirely sure the build-your-deck-before-the-game has much more in it.