ZDNET's key takeawaysI went for a run with the Galaxy Watch 9 while visiting London. I had been testing the Galaxy Watch Ultra 2 for around a week before I got my hands on the Galaxy Watch 9. Nina Raemont/ZDNETI've worn two generations of both the Pixel Watch and the Galaxy Watch now, and one thing I prefer on the Galaxy Watches is the flattened watch display. I can see all the puzzle pieces for a Samsung AI health assistant coming together on the Samsung Health app -- and even an opportunity to beta test an AI health coach coming soon. Also: I wore the Samsung Galaxy Watch Ultra 2 for a week - it's a true Apple Watch Ultra 3 rivalI'll get more in depth with the Galaxy Watch 9 soon -- particularly to test how it compares with the new flagship, the Galaxy Watch Ultra 2, and its previous-gen counterpart, the Galaxy Watch 8.