I also noted that! I don't have access to the beta yet, but judging from the screenshots it looks like it's actually still San Francisco, but with some modification(s?). Specifically, Notes now uses a one-storey "a", which might just be a variant glyph already part of SF. Seems like Notes in macOS 10.13 doesn't use that variant (again, judging from screenshots), so I'm wondering what differences you make out in the macOS beta. Could you maybe upload a high resolution screenshot with some dummy text?
Here I was hoping they would finally get rid of the paper skeupmorphism in Notes on iOS, but instead they chose to add an ugly one-storey "a" ...
This has been annoying me. This is an inconsistency across apps, and the 'a' throws me off everytime. Just downloaded iOS 11. Don't know where else to post this or who to ask.
>Don't know where else to post this or who to ask.
As iOS 11 is now public, user-centric queries/comments such as this are perhaps best put to Apple's public community support forums, run by AppleCare, and/or Apple's twitter support account, vs. risking off-topic here in the DevForums, thanks and good luck.
Users can feedback via http://www.apple.com/feedback/ - Individuals using betas are free to use the Feedback Assistant; devs can use the 'Report Bugs' link, below right.