Blu-ray.com has reviewed this with the following summary:

"I wish I could say the new Blu-ray edition of Ran is the definitive version of an iconic masterpiece, but I'm afraid I was left slightly underwhelmed. I wholeheartedly believe it surpasses prior editions in every way, and might go so far as to conclude this is the best the film will ever look, but I can't shake the nagging hope that someday we'll witness the results of a dramatic restoration effort. After all, if Paramount could rescue The Godfather films, there's reason to believe the same effort might eventually land on this classic. Having said that, I doubt a restoration is anywhere on the foreseeable horizon, and Ran deserves a spot on the shelf of any serious film fan. Count this reviewer in for a lukewarm recommendation."

Unfortunately looking at his wording he doesn't seem to have seen the Studio Canal version ("believe it surpasses"). I'll be waiting n a definitive confirmation this is a new print before going for what seems like a minor upgrade of what we already have. Damn Studio Canal not letting and company like criterion who is an expert in restoration not do RAN. It would surprise we if Criterion had actually finished their High Definition print when the carpet was yanked from them.