Comment by yunnpp

This is really not the right comparison to make. An OS will use memory liberally. Give it more and it'll use more. Give it less and it'll swap to disk. So the real question is how long a given workload takes to complete, or whether you can multi-task without shitting out to/from disk every time you switch windows. "My OS uses X amount of RAM" is an entirely meaningless and irrelevant statement.