I remember reading about that too ApK, and think you are absolutely correct. The screens on the Mini and 350 aren't quite as good as (for example) the Sony T1 or Kindle Touch. I certainly felt my old Kindle Keyboard had a better looking screen than my 350, but it's pretty negligible. And they make up for that in their neat size, and at least in the case of the 350, it's solid but compact feel.
On looks alone my blue Sony 350 is my favourite:
However, looking at the 3 ereaders currently in my house, with the displays off on them all, you can see the improvements in the screen tech. The attached image shows the PW on the left with a far lighter looking screen.