Which is better?

Rainbow comes out ahead on multiplier, but the right pick depends on your goal — read both and decide.

Rainbow: The strongest evergreen (non-event) mutation and the reason Unicorn is the most chased pet — a Unicorn doubles your Rainbow roll chance. A Rainbow crop at high weight is a top-tier sale.

Gold: The entry-tier value mutation. A Golden Dragonfly pet doubles your Gold roll chance, making Gold the bread-and-butter multiplier for consistent income farmers.