Not only are there no physical differences (the bits transmitted from Google images and from the NFT link are physically the same) -- there's also not a real metaphyiscal or conceptual difference, because the bits being transmitted when you look at an NFT's link are not original and have no inherent link to the original, they're copies, just like you would get transmitted from any other link.
It's more like going to a museum and buying a special ticket to see the Mona Lisa, but instead of actually seeing the original Mono Lisa in all its glory, you instead go into a separate room where you sit down at a laptop and still look at a JPEG of the Mona Lisa.
In other words, no camera will ever capture the experience of walking into LACMA and seeing a Rauschenberg or a Picasso in person, walking up to the painting to look closely, stepping back to see it in the context of the space, reflecting on it's relationship to other paintings on the floor, etc.
Beyond that, there is so much context--physical, cultural, and intellectual--going on when you walk into a gallery and look at art. You lose all of that when looking at digital slides, no matter the quality.
Would you rather see the real painting or a high res rendition?
https://specials-images.forbesimg.com/imageserve/488167591/9...
Would they be better served by a high resolution rendition?
The first time I saw a masterpiece in person, despite that I'd seen the image probably thousands of times preceding that, the experience was amazing. It totally took me by surprise. Looking at a jpeg, or even a printed reproduction, isn't even in the same ballpark.