Ernest S. Arvai has written a very good and detailed comparison between the P&W GTF engine and the CFM LEAP engine. Here is the link:
Here are a few summary comments:
“Engine performance comes from a blend of propulsive efficiency (generated by the fan) and thermal efficiency generated by the core. Roughly 50% of a modern engine performance is dictated by each element. The GTF, with a larger, slower turning fan, has an advantage in propulsive efficiency, and the LEAP, to provide equivalent fuel burn improvement, would need higher thermal efficiency. That would require a hotter burning engine.”
“Airinsight estimates that the PW1000G will have between 1,500-3,000 fewer airfoils, six fewer stages, and about the same number of life limited parts in its configuration when compared to the latest information we’ve obtained on the LEAP.”
“We would expect the GTF to have an advantage in maintenance costs over the LEAP based on two factors – fewer parts and slightly lower (turbine) temperatures.”
We now need Lightsaber to add his expert analysis to this article.