What do you call the output that results from subtracting one binary number from another?

The term used to describe the output from subtracting one binary number from another is "Difference." In arithmetic, when you perform a subtraction operation, the result is called the difference between the two numbers involved in the operation. This concept applies to binary numbers just as it does to decimal or any other number system.

In contrast, the sum refers to the result of adding two numbers together, the product is the output of multiplying two numbers, and the quotient is the result obtained by dividing one number by another. Thus, the correct terminology for the result of a subtraction operation, specifically in the context of binary numbers, is indeed the difference.