ZMC2 seems like it covers the spectrum overall better than ZMC1 and to me it also seems like it's better spec'd to use with multiple carts. I've never really understood why ZMC1 exists if ZMC2 covers that whole spectrum?  Possibly someone could elaborate on that.

I'm interested in buying a Rega Apheta Cartridge (I know somebody who is selling one for a really good price with low hours).  His phonostage doesn't load the cartridge properly and he likes his stage and doesn't want to get another one so he's had this cart sitting collecting dust for a few years now.  

The Apheta manual says proper loading is between 50-75 ohms, but I've heard that 25-30 ohm loading is even better, so since it likes low loads I'm just wondering if the ZMC1 would be a better fit.