Moses used this question in order to emphasize that if God does not go with them, no one will know that Moses had found favor in God's sight. Alternate translation: "no one will know ... people." (See: [[rc://en/ta/man/jit/figs-rquestion]])
"everyone will know that I and your people are different." The words "be distinct" translate the same Hebrew word as "set ... apart" in [Exodus 8:22](../08/22.md), so if your language has one word or phrase for both ideas, you may want to use it there and here.