Crab,
The Product Support former master sergeants who write the newsletter couldn't know how to certify an engine. I promise you that the same engine parts, exactly, are often used with different top part numbers and different overhaul intervals when one changes to engine usage spectrum to allow more (or fewer) cycles at high power. In such cases the hot section is typically listed at a different dash number so it cannot be confused with any hot sections from other engines that have different usage, even when the parts of that hot section are identical in every way. Often, the engine data plate, maintenance manual chapter 5 (life limits) and dash number are different for the same (otherwise) engine when the useage changes. Those who do not believe this are those who don't understand it.
I have sat with the engine companies (Rolls included) and negotiated more cycles for less TBO as a way to get more aircraft performance.