What about the other specs?
I really don't think the question here is if the difference is noticeable or not. If you are paying a premium you would expect nothing less than the best
I think millions of current users of NVME SSDs are also paying a "premium" for numbers on paper that have zero impact on their daily computing experience. In this case, you're paying the premium for the Surface name.
That's what's odd.. No official specs yet and it a few weeks away from shipping..
Rumor has it that the i5 is a 7200U which is another bummer..
If this document is legit, then it is a 7200U
https://msblob.blob.core.windows.net/ncmedia/2017/05/Surface-Laptop-Fact-Sheet.pdf
Compared to the 7300U in the new Surface Pro
https://msblob.blob.core.windows.net/ncmedia/2017/05/SurfaceProFS.pdf