Zack Nelson, also known as JerryRig on YouTube, has gotten his hands and Mohs Picks on the brand new Samsung Galaxy Note9 and his durability test video is up. Long story short, the Galaxy Note9 doesn't exhibit any critical flaws. It scratches at the same level as other flagships, doesn't bend too much (unlike the broken Oppo Find X) and is overall as sturdy as you'd expect from a device of this build and price tag. Zack even goes on to break the new Bluetooth-enabled S Pen in two to show us that super capacitor. Here's the full video.
Source: https://www.gsmarena.com/samsung_galaxy_note9_aces_durability_test-news-32846.php