The Blu-Ray edition of all 9 films are 4K ULTRA HD with HDR. They are higher bitrate than the Disney+ streams so therefore higher quality (and also NOT just copied from Disney+ with only subtitles added). The only difference is HDR10 compared to Disney+ Dolby Vision. It even says 4K UltraHD on the covers of both the single sets, trilogy sets and the complete collection box set, so do you even own the UHD Blu-Rays?
For example. The 2006 Bonus DVD theatrical versions cover said “widescreen” and “fullscreen” but they weren’t. And the 2020 Blu-ray is 4K HDR. The Sequel Trilogy and Prequel Trilogy is 4K UltraHD in the 2020 Blu-ray. There’s no doubt about it. But the Original Trilogy is HDR, not UltraHD.
Are you just messing with us now? The 2006 theatrical DVDs contained the 2004 version and the theatrical version. The 2004 version was presented in widescreen (16:9) while the bonus theatrical version was presented in fullscreen (4:3) letterbox so what was said on the cover was completely true. Of course the 4k blu-rays of the OT are Ultra-HD. It’s obvious you haven’t got a clue what you are talking about. UltraHD is the broadcast standard. It isn’t full 4k, but the 4k tag has been adopted for marketing reasons for this medium. UltraHD is 3840 x 2160 pixels while true 4k is 4096 by 2160 . ALL of the films in the 4k saga set are UHD. Check your 4k versions and you’ll see that the resolution on all of them is 3840 x 2160, therefore UHD. We’re trying to explain this to you but you just seem to completely ignore everyone who is trying to help educate you in this matter.