That grain is fantastic. Good find! She’s a beaut!
In my experience I’d say your assessment is correct. The 320KS is not super-comfortable to clench in my opinion, but it more than makes up for it if you have time to just sit and enjoy a bowl. The stummel shape is one that feels like it was made for your hand to wrap around.The shape always intrigues me, although that Birdseye is worth getting almost no matter what pipe it’s on.
The 320KS strikes me like a churchwarden, as something best used sitting down, when you don’t mind holding the pipe in hand for the entire bowl.