All those are same quality as the DVDs. All those three sources has a poor deinterlacing.
If you go from interlaced source (59.94) and change it to 30p, it will lower the resolution and motion is not as smooth. Also the wrong framerate will make it jumpy. There are no shortcuts.
That's why the QTGMC is still hands down the best. It will double the framerate. Video Enhance AI (VEAI) also has the double framerate option with the latest beta, but it doesn't handle the motion very well.
VEAI is an asset. I doesn't replace the other software. It just adds an extra step (or two). Problem with VEAI is that you need to clean the source best as possible, before upscaling. Using QTGMC cleans the source a lot, only problem is that the processing time goes x2, because the doubled framerate. After deinterlace you can also try to clean the source with Neat Video, or using VEAI with 100% denoise. Once you have the clean source as possible, you can upscale it to 1080p or 4k.
Sometimes the VEAI offers quality that is out of this world. I just stare the results in disbelief. Yet, it's hard to recommend the software to regular Joe, because you need to dive deeper to video editing world to get most out of it.
Led Zeppelin 4k: