The 101 doesn't have the Scene Selector switch which allows you to open up the aperture wider in lower light situations. Also, the 101 doesn't have settings for 150 speed and 300 speed film, which also allow you to play with exposure, though perhaps not in the way that E. Land intended. The 100 has these features. As do the 240, 250, 340, 350, 360, 440, 450 and the higher end 180, 185, 190, 195 as well as some non-USA marketed models.
That being said, I've gotten good results from all of the models I've shot regardless of features, glass or plastic lens, etc.
Check the Land List for details on models.
http://www.rwhirled.com/landlist/landhome.htm