"The Wacom Companion or SurfacePro have the advantage to run Desktop apps. But the problem or question is if desktop apps on such a tiny screen is really a good idea.Another very important and even more important factor is the drawing tool. The SurfacePro pen is weak in my feeling. It does not offer tilt well, has pressure issues and in general is ok for note taking - not for drawing. The Wacom one obviously is good - but say hello to the typical Wacom parallax effect: where you stylus is is not where you will paint.The Pencil however edge to edge offers perfect draw positioning. If you go with ProCreate you can also ghost without drawing and have a stroke preview. I find the iOS apps lacking features compared to desktop apps, however if you are only interested into sketching I honestly have to say with the iPadPro you get a better pen, better battery time, better mobile OS gestures in the drawing app and all that for actually less money.Then get DuetDisplay and you can use the iPad as a second display including gestures and pen pressure with Win or Mac with nearly zero drawing lag!"