Use "qualitative difference" in a sentence

1. Is there any qualitative difference between these two video recorders?

2. If we exclude the wealth measures from the earnings equations, it makes very little qualitative difference.

3. When an age period is referred to as a stage, the term implies not only this qualitative difference, but also a predictable sequence of developmental events, such that each stage is both preceded and followed by specific other periods associated with characteristic behavioral or physical qualities.

4. In that same judgment, the European Court of Human Rights held that, ‘in accordance with the principle of in dubio pro reo, which is a specific expression of the principle of the presumption of innocence, there should be no qualitative difference between an acquittal for lack of evidence and an acquittal resulting from a finding that the person’s innocence was beyond doubt.