Supersix evo headset query

Rynodinio081

hi,

wanting to save a little on a headset, plus i have my own headset cap from kapz so was not wanting the cannondale own one.

will these fit?
http://www.ribblecyc...et-1-1-8-1-1-4/



http://www.ribblecyc...set-ribble-cr3/

i cant see why not, but thought i'd check

if not which one? are the crown races anything special? i assume no, but read somewhere they are slightly varied in size


cheers