No, the M5 was. Actually they're still hand crafted, but what you probably mean (the switch in production methods) happened after the M5 and before they took up M4 production again (see e.g. on Stephen's page
http://www.cameraquest.com/m5.htm). The M4-2 and M4-P are already different.
I've peeked through M4 and M5 finders so far, the main difference is that the M5 finder has a meter and a shutter speed display, the rest is the same. For me it'd probably be either an M2 or an M5.
Philipp