Cintiq any different than TabletPC Experience?

Hi,

Looking to get a new Cintiq 21UX.
I use Sketchbook Pro on a Tecra M4 TabletPC.

My question is, will a Cintiq 21UX be that much better of an experience?
What, if anything would be different other than the big screen and pressure sensitivity?

Trying to find out if it’s worth the investment.

Touch strips and hot keys, better color reproduction, larger work surface, nicer pen, support for Pen Tilt in apps like Painter or Photoshop.