Not quite the same. A C120 Ku-band LNB has two probes for H and V with voltage switching.
no the c120 feed horn dont have probes in it the lnb douse
originaly the c120 feed horn was made for prime focus dishes and single band lnbs then duel band lnbs then triple banb lnbs none of these lnbs worked with out a magnetical or macanical polarizer as they all only had a single probe in them to pick the signal it was the polarizer that swaped from horizontal and vertical sam as a c band lnb
no feed horn will swap signal from one polarity to the other
all the feed horn doues is feed the signal in to the mouth of the lnb
so yes i douse work on the same prinsable
except the original ku band need a polarizer same as a c band lnb douse
more moddern lnbs mainly made for off sett dishes i.e. universal exsetera dont need the polarizers any more
is this a little more clearer for you
ive been fitting satellite dishes since 1980 befor any one had even hear or rupert murdock
and i am sill useing a corrotor with c band and ku band lnb on a 7 ft 6 inch prim focus dish
please pardon spelling