The EM split image somehow has more tolerance to off-center placement of the eye when I use f/3.5 lenses. It has more tolerance than K screen on my oldest FE. K2 screen (needs +0.5 exposure compensation on FE) is very bright but split image darkens just like K screen. The split image on K3 (needs +0.5 exposure compensation on FE) never darkens but gets translucent when I use f/3.5-4.5 lenses.
I bought a Nikon EM body for $10, it was fully functional except the slower speeds and the foam was really sticky. I changed foam using Mr. Goodman’s (Interslice) directions but the mirror damper foam placement is more difficult than an FE. I advise Nikon lovers to buy EM bodies otherwise they are going to trash in these days.