Here's what I got so far: first there's the older version of the standard Evi face mold with molded and painted eyes. Then there's a newer version of the same mold that's flatter to allow for screened-on eyes. (And both are descendants of the original Evi face mold, which seems to be a clone of the Heart Family kids/Barbie's Li'l Friends.)
Then there's a completely different girl mold that might be a friend? I'm not sure, but I did find out there was an Evi line called Children Of The World that seems to have used both (here's the Japanese girl using the most common Evi mold, and the same doll with the other mold). The boy is called Timmy, and judging from photos his mold seems to have been upgraded for eye screening too lately.
Here they are in profile as well - I find it's often easier to tell face molds part from the side. (These photos aren't perfect, but you get the idea.)
(Oh, and I just realized something - I miscalculated my 100th post anniversary. I went by the number on my dashboard, but I forgot Blogger includes unpublished drafts too... No need to panic though, since according to the new figures, this is my 101th post. Whew!)