Sketching digitally definitely has some pros and cons. The pencil tool in Paper53 using the Apple pencil creates such a likeness (above) so that it is difficult to tell the type of media.
In the above work, the pen and fine liner tool are also used for details and finer work. This allows for example for cross hatching and line work to feature in certain areas.
In other areas, shading with the digital pencil allows a softer and more subtlety in tone. The sketching still is worked and reworked similar to a drawing on paper.
What do you think?