I don't think this is quite a fair comparison. The 35mm scan seems to be unprocessed to some extent and is likely not indicative of the grade on the final print that made it to theaters. In modern terms, this would be like comparing Red raw footage to the final graded cut of a film. It's cool to see the difference, but I doubt this is what the film looked like in theaters and so this article is a touch misleading. Of course restorations don't always match the original film, usually because they're sourced from the negative which is several generations away from a theatrical print. That will affect the clarity and contrast and is only natural. Judging by the common themes in the grading from all the mentioned home releases, what we're seeing in the 4K release is likely pretty close, but I'm not very familiar with the material. Also, holy cow, what was up with that 3D blu-ray?