I don't know what you're talking about or what you're looking at, but there definitely is a difference between the file in the OP and the 4K version.Edit:
There is no difference between the 1080p version and your shared "4k" version even the framerate is the same...
rf96
Edit: was wrong, seems like it's the same video but with bloated file size.
So let's wait till someone drops really the better version some day...
First of all, this is the official Jackerman 4K version. Anything else with higher FPS was not released by him.
Secondly, catching a difference on a video between 1080p and 4K depends on what monitor you're watching it on. On my 1440p screen - there is a difference. What I can say from experience, is that I thought 4K videos pointless when I had a cheaper 1080p TN panel.
Lastly, here's a comparison between the file uploaded in the thread and the version which I shared: