That would be a formidable task, considering the amount of Hobbit edits out there. Many of them are pretty similar too, at least in terms of what's been cut and what's been left in. What would also help in comparing the edits would be the actual quality of them (technical proficiency, transitions, resolution, audio, etc). This would help viewers weed through some versions that may not have as much "polish" to them.
For example, the Tolkien Edit had a pretty good cut list but was horribly edited IMO. The transitions were bad, it was in SD, and the editor used a pirated DVD screener of BOFA for his source. But of course it's the most-viewed Hobbit fan edit out there, because it was the first one released.