What does "differentiator" mean?

Anything that differentiates, or causes differentiation (in any sense); a distinguishing feature.

What is a synonym for "differentiator"?

Common synonyms include: discriminator, distincter, gimmick, individualizer, personal branding.

noun

noun ·Rare ·Advanced level

Noun

1
Anything that differentiates, or causes differentiation (in any sense); a distinguishing feature.
2
a person who (or that which) differentiates wordnet

From differentiate + -or.