"Imperf" Vs. "Die Cutting Omitted"

On modern die-cut stamp errors, I see an inconsistency in the Scott catalog and auction listings in the naming of the error when the die cuts are missing. Some listings call them "imperforates" as you would see with earlier normally-perforated stamps, and others are listed as "die-cutting omitted." Do these terms have exactly the same meaning? Why is one term used sometimes and the other term used other times?

Answer to the question: "sloppyness". It should be "die-cutting omitted" to be correct

Peter

Imperforate adj Not separated by rows of perforations.

Die cut stamps are not perforated but punched.

Can you cite an instance where Scott shows die cut omitted, as imperforate?