Only the Sage and Elipsa support a real pen. The things with a rubber tip as a stylus for phone/tablet only give same resolution as a finger. The capacitive touch is only just good enough to use menus, keyboard and you find if font too small you can't easily highlight.
The Pen uses a digitiser inside the Sage & Elipsa that is probably higher resolution than a pixel. The other models have no digitiser.
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