The small Lunette has (from top to bottom):
writing: "Lunette" and "made in Finland"
a small rim, not very pronounced
two measuring lines
three grip ridges
grip ridges on the stem (I'm not sure how many, since I cut most of my stem off)
The small LadyCup/ColorCup has:
no lines or markings except for some grip bumps at the base and on the stem
[I only have the trial one from their promotion a month or two ago, so correct me if the "real" one is different.]
This could also help people who are not looking for smoothness but are looking for measuring lines or grip lines.