case of surging sparks booster boxes Pokemon Sleeved Eight (8) Packs : Toys & Games revealing a parade of dragon Pokémon led by the towering Alolan Exeggutor ex Surging Sparks Booster Box -

So, the game still works off the bigger number wins ruleset however the alignment system also includes a rock paper scissor element where even if the attacking monster has more attack it can lose if attacking the wrong alignment meaning a 3000 ATK monster can lose to a 250 ATK monster simply because a feature that is both inaccurate and not included in the TCG says so

Even without changing the rules for phasing much, it turned out to have very relevant advantages in the modern Commander metagame

So of course, like any other Ritual Based deck, there's those Monsters that make it so that it counts as the ENTIRE tribute for the Ritual Summon, well "Fan-Fan" is one of those monsters

Authentic Japan release

[8] When Bastemon joins Xros Heart, she brings two new DigiMemories with her from her castle in Lake Zone: Impmon and Tailmon