Microsoft Surface Book vs Surface Pro 4 for sketching and SW

I am considering using an Onda or Cube tablet with the latest specs and Win OS for sketching together with a third party stylus (the FiftyThree pencil looks great).
I imagine that 9.7" and 1200p is the minimum I can reasonably sketch with.
Does anyone have experience with these Asian brand tablets for professional use?

The ellipse tool alone is the reason I will switch to Leonardo, by the way :bulb: