i just bought Primada from maybank treatsfair yesterday at mv.
the slower the rpm the better becoz heat is less and it will preserve more fruit/vege enzyme which is the main point of slow juicing.

i am trying to do my own survey too (not so helpful to do it after u hv bought something, but wat the heck)... and i couldnt find much info i was looking for. eg: comparison chart among the brands u mentioned above.

from what i found, primada is the only one with Double Angle Auger ... the rest are with one (if i am wrong, someone pls correct me).
This double angle auger is the lastest update only done in 2012.
so i concluded that the other brands are selling outdating clone products... Primada is the leader of this technology for others to copy ... just my own opinion.

btw 80rpm is primada's earlier model before they updated it with 57rpm last year. slow doesnt mean the juicing process is slow to get the result, it just means lower heat.
grinding stuffs works on any speed. primada comes with the Grinder expansion set... other brand i am not sure if they will give u that. if they dont, u cant even grind with just the main unit.

Good luck and happy slow juicing

This post has been edited by aaronwee: Jul 8 2013, 01:16 AM