The best the film has ever looked on home video is the 4K. Any of the blu ray’s are fine for 1080P. I personally wish we had the theatrical cut on the 4K disc i don’t care for the added scenes.
I have the 35mm grindhouse and it is very soft looking. I don’t think we will ever have a version of the movie that is perfect. the digitally shot scenes like the midichlorian test stick out like a sore thumb.
I think they may have sharpened the blu or 4K but i’m not 100% sure. But it certainly is sharper looking in the scenes that aren’t dvnr waxy.