Lisa Gade explains the different kinds of pens used in current Windows convertibles and tablets, as well as in Android tablets like the Samsung Galaxy Note and capacitive styli used with iPads. She covers Wacom, N-Trig, Synaptics digital pens and the capacitive stylus to show their differences, similarities, strengths and weaknesses. Devices used include the Microsoft Surface Pro 3, Lenovo ThinkPad Yoga, Lenovo ThinkPad 10, Sony Vaio Flip 15, Dell Venue 8 Pro, Samsung Galaxy Note Pro 12.2 and the…