Are they at the same bandwith, I mean you will be able to tell the difference between 100mbs and 30 mbs content, that would tell us nothing about telling the difference in the resolution.I can definitely tell the difference between 4K and 8K...
A giant amount of talk about 4k vs 1080p is people often seeing higher bandwith content when it is called 4K, would Netflix stream people 40mbs 1080p content or 40mbs 4K content, the story would be all about that it change nothing.