The BD has some horribly blown out whites. This is particularly noticeable in the opening of the ark sequence. A lot of detail has been irretrievably lost. The WOWOW makes for a far better source in my view.
Depends on what you consider more important. Neither source is perfect, both have their strengths and weaknesses. When considering what source to use for one of my regrades, how natural the grain looks and how filmic the transfer looks overall is what is most important to me, blown highlights/crushed blacks/softness in certain shots are very much secondary issues by comparison.
I love the look of natural film grain so the grain looking as natural as possible is one of the things I consider most important when choosing a source. For that reason I have no plans to do a regraded release of the latest 4k remastered release of Terminator 2 to remove the blanket teal tint for instance because the source has been massively DNRed and has very little grain left, even though technically you could say that it has more overall detail than previous blu-ray releases.
The 4k remastered blu-ray of Raiders of the Lost Ark has much more natural looking grain and looks much more filmic in comparison to the more blocky digital looking WOWOW release so it makes for a far better source for me.