both are same, none of them is built with wireless k1plus is replaced with pridelogy, both are equally supported and have same software features, if u can get hands on with plus model, it would be 20-30 dollars cheaper then pro..
u must need to buy khub and k1plus or pro, model in order to watch nagra 3 channels, there is option for standalone which was available during nagra 2 and it will be available once nagra 3 is cracked (if u don't wanna use iks)... but for now until nagra 3 is cracked u must need to use iks in order to watch channels.