The AH charts are generated by the flight model. I believe any other lists were made by flight testing.
Also believe this ^^^^ to be correct!
I know several folks have done some data gathering over the years (for select planes), but I haven't found the equivalent of dash-1 charts for all the planes. If you find a complete data set, I'd love to see a copy! :-)
One of the things I would caution everyone on, is that load out and fuel states can vary tremendously (and so will your performance). The performance charts are a good starting point for planning (They are calculated on somewhat random total weights), and I'd advise you to use a safety pad if you are planning to stretch gas for a long mission.
Like Mongoose, I use the comparison charts when doing mission prep or post-mortem film review (usually to figure out "how did I manage to get myself in trouble this time?").