Yes. The good part is that we basically just need to copy paste the upstream code and only use our colours. For the dark headerbar we use a dedicated tweaks file though.
I can do a side by side comparison of that helps.
We tried to keep as much design as possible while aiming for minimum diff (yaru was always based on the upstream themes, but the tweaks went a bit out of scope lately and it became hard to keep track of the upstream changes and keep track of changes that are bound to the technical side (outside of scss)).
Some things you can see on the first spot:
- headerbar is no longer flat and buttons have borders
- switches are round
- menu hover is orange
- shell now has a full light and a full dark theme, we just miss the switch to toggle this
Edit: lol I was too slow 
though Carlos screenshots are a tiny bit outdated