This one’s easy
Step 1: Is your format best of three games or best of one? If best of three, you can for sure include at least one of these. Which one we can decide later. If best of one, then does your format have a high density of important artifact or enchantments? If yes, then you can consider running one. If no, then you cannot. One cannot include a card that is sometimes dead if the wrong opponent is getting paired with you.
Step 2: You have accepted to run one of them for the above reasons. Now we determine which one. Does your cube have one or more decks in green and/or white that care about creating tokens? If yes, then you have to run Growth. If will signal a deck the players can strive for. If no, then you cannot run Growth. You don’t want to signal a deck that isn’t there for the players to assemble.
Step 3: If you have accepted to run one of them and also accepted which one. Then we must decide if you should run both. Does your cube have such a high density of artifact and enchantments while also having a token theme in green and/or white that you can afford to spend two cube slots on
Disenchant? If yes, run both. If no, run the one you decided in step 2.