I have a surface pro 4. I bought it mainly as a laptop but also a bit as a tech toy. I wanted to like the surface pen and to use it for drawing, but I'm finding it quite annoying. It needs too much pressure to make even light marks. It just feels wrong to have to push the pen into the screen to get a mark (even adjusting the pressure setting in the surface app). Also you can feel the nib of the pen moving when you press, like you're pressing a little switch.
Is the apple pencil more sensitive? I'd like to actually draw faint lines with roughly the same pressure I'd use an actual pencil. Or is it still a bit artificial when used gently?
Apple Pencil has the best light pressure of any pen. It even beats Wacom pro pens. Even the slightest touch can register (for example, just letting the pen rest on its own weight) and most good apps have the option to fine tune this to your preference (Procreate, Paintstorm, etc).
At the same time you don't feel the nib move (unlike Wacom pens and the ones on the Surface)! It feels solid, like a true pencil.
One more thing that is great - the control of pressure.
It is, by far, the best stylus out there - for any device.