Better to use FSXMark07, as it's more widely used, and it uses High Global settings uniformly. FSXMark11 actually turns down some scenery settings compared to FSXMark07, to achieve an artificially high frame rates. Also, FSXMark11 is an adaptation (copy) of FSXMark07, with no credit to FSXMark07 author Gary Dunne. We should discourage use of "copied without credit" software.
In either case, it will be necessary to adopt a set of standardized settings for P3D2, similar to FSXMark07's Global High standardized settings for FSX.