With all that being said, I have the IIe and IIgs side by side on the desk, and use a composite to HDMI and SCART to HDMI to feed video output to a modern LCD. In that use case, I love how the IIgs can 'fake' the green phosphor screen color, and it is certainly faster for accessing BBSes, using...
I think its a familiarity /personal preference thing, nothing scientific. I just always liked the form factor of the IIe better. I like the keyboard better, and I never really used or needed the GS-OS interface much. I Found myself staying with PFS write and the older version(s) of Apple Works...