It's debatable. It's all one source so they have a more consistent look than the despecialized. The resolution is higher, but due to most of the despecialized being taken from a higher quality source they still sometimes look better.
For Star Wars, it's debatable.
Empire strikes back isn't out yet, so despecialized is your only option.
For Return of the Jedi, the reel used for 4k83 is extremely clean, I think it looks better than the despecialized.
It's debatable. It's all one source so they have a more consistent look than the despecialized. The resolution is higher, but due to most of the despecialized being taken from a higher quality source they still sometimes look better.
For Star Wars, it's debatable.
Empire strikes back isn't out yet, so despecialized is your only option.
For Return of the Jedi, the reel used for 4k83 is extremely clean, I think it looks better than the despecialized.
This comparison may help you decide. https://m.youtube.com/watch?v=EKYiISAYCm0