NiMH are nominally 1.2
NiMH batteries are nominally 1.2V, but they actually charge to more than that. 1.4V isn't uncommon, and I see 1.35V on almost all my batteries when fully charged. It drops as the charge is used up, down to 1.2V and less when the useful charge is gone. Alkalines start out at ~1.5V, but that varies also, and drops as the battery is used. For practical purposes, especially charging other batteries, they're pretty much equivalent.