Pros of Vikavolt:
Pulls Energy directly from the deck, instead of relying on getting it into the discard first.
Practically guarantees you will be able to use Nature's Judgement every turn, as long as you are able to Strong Charge
Vikavolt can be a powerful single-Prize attacker in a pinch, with a respectable 150 HP and is capable of hitting 180 with a Choice Band.
Cons of Vikavolt:
Is a Stage 2, meaning it's clunky, and takes time to set up, even considering Rare Candy
Reliant on using Strong Charge every turn. Even one turn of not being able to use Abilities can put the deck behind.
Requires using Lightning Energy, which hurts consistency by splitting your Basic Energy count
Pros of Lurantis:
Doesn't rely on Abilities to accelerate Energy
Uses exclusively Grass Energy
Lurantis-GX is a respectable attacker in its own right. Flower Supply chips away at Pokemon, while Solar Blade provides an option to two-shot, and Chloroscythe GX is very powerful without discarding Energy.
Lurantis Promo helps both attackers do additional damage to hit important numbers.
Sets up quickly and consistently
Cons of Lurantis:
Requires Energy to be placed in the discard before Flower Supply does anything useful
Cannot attack with Nature's Judgement every turn
Fares poorly against Volcanion and single-prize attackers, other than Greninja which both decks beat easily.
For the current format, I feel VikaBulu is the better play. Garbodor can be mitigated with Field Blower, which the deck runs multiple copies of and can be searched for with Skyla. It can also play a slower game and not rely on items, reducing the threat of Trashalanche. Once set up, Tapu Bulu-GX will hit 180 on any opposing Drampa-GX, and will also one-shot Espeoon-GX with a Choice Band, while discarding its own Energy and making Psychic do little damage. Zoroark and Zoroark BREAK are still threats, but even the Lurantis version doesn't counter them. Vikavolt can better resist Vespiquen and other single-prize attackers by setting up multiple single-prize attackers that can power each other up with Strong Charge.
When the rotation is announced, this should be reviewed again moving forward.