My note 8 spent most of the year in a drawer, it was a major disappointment to me. The Note 9 has been my daily driver since launch, and i love it. Major improvement IMO, all the little things add up, less rectangular and more square design, improved camera, much better battery life, improved spen with remote features, better screen, larger screen, smaller bezels (top and bottom), faster performance, smoother graphics, improved touchwiz (better software performance), faster data speeds, and increased storage.
Yes, all those improvements were minor ones, but overall they add up to a significantly better and more polished product.