Continual improvement is where it's at
My immediate impression was that there's now very little distinction between a Phablet and a plus-size handset
So don't use it. It was made up by marketers and largely ignored by the populous.
With its phones Samsung has pursued a strategy of continual improvements. There's been the odd tick-tock: the Notes get something special or the Galaxys do. Over time high-end becomes standard: high-res, edge-to-edge screens, wireless charging, etc. This is how consumer electronics works and why Samsung is doing well at it. That it has managed to throw in some significant changes: split screens and DeX spring to mind, shows how hard they're working on next-gen stuff.
The stylus is nice to have for most of us but essential for some which is why the Notes continue to sell well despite the price.