the nordica binding is just a vist binding. never used one myself for a flat mount but on the system skis they seem to be fine. buddy of mine has them mounted on his patrons and he hasnt had any complaints with them.
cant comment on the higher din freeride version but i have a nordica dobermann carve skis which used to have vist 12 din on it, roomy ripped the heel piece off, i now have the 11 din version. fml. my other skis have fks 15 and px 15 :p