差 (sa) means “difference” | MotiTan Japanese Dictionary

More examples

この二つの製品には価格の差があります。ko no futa tsu no sei hin ni wa ka kaku no sa ga a ri ma su

There is a price difference between these two products.

Shows what separates two compared things in amount, level, or condition.

違いchigai: A point or amount in which two things are not the same.
開きhiraki: A distance between two levels or amounts.

二つ以上のものを比べた際の数量や状態の隔たり。futa tsu i jō no mo no o kura be ta sai no sū ryō ya jō tai no heda ta ri

差 (sa, "difference") is a Sino-Japanese word based on the Chinese character 差, whose core meaning is a difference or lack of equality.

The English words difference and gap can both translate 差 (sa), but gap more strongly suggests a distance between levels or amounts.