Making two copies of the same group look different

Place the same group twice and set a different Variation Seed on each. Every random value inside that placement shifts together, all the way down through groups nested inside it. A seed of 0 means no change, so one copy can stay exactly as authored.

The row only appears when the group actually contains something random, so if you do not see it, there is nothing to reroll.

Overrides are the other tool, and they reach exactly one level. You can change a value on the group you placed. You cannot reach through it into a group placed inside it. When you need that, give the inner value a real group input and route it out, which also makes it visible to whoever uses the group next.

Variation Seed is for rerolling. For anything you want to choose rather than shuffle, use a group input.