I wouldn't say that the resolution is worse... but rather that the codec compresses the image so much that the end result looks more like a much lower resolution than it should have.
And that was obvious from the get-go, since the low internet speeds posted as necessary for 1080p60 and 4k made it very clear it would be hyper-compressed compared to industry standards.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/