The Komet's amazing performance was one of the reasons for starting this website. However, I never got around to dive deep into the subject. For the time being, a few links:
In 2003, I added a link to the 'Flugleistungen' website, that had 19 scanned Messerschmitt graphs of Komet performance. The site lasted until 2008, but I saved the graphs, and the Wayback Machine saved the HTML text. The five pages regarding the Komet have been recreated on a separate page on this site: Flugleistungen. This data is waiting to be analyzed and processed.
Document 'F-TS-1042-RE: Comparison of High-Speed Tests on Several Airplane Models' is a translation of the German document 'Vergleich van Hochgeschwindigkeitsmessungen einiger Gesamtmodelle' by Lienarz, translated by Chance Vought Aircraft, release date February 1947. It compares wind tunnel data of the Me 163B, Me-262, Me-328, He-177, He-219, Ar-234 and Ju-287, with a focus on high-Mach number drag rise.