Share 'Methodolgies compared'

I'm a little loathe to ask this question but I'll bet there are others thinking it. How do the various methodologies of EE compare? I am not looking for the one truth and I appreciate this may not be a "fair" question in terms of commercial sensitivities but my questionis geuine as we are trying to establish some form of a benchmark, using 'different measures.' I am familiar with the research…