The purple one looks like it has a weird downturn at the top tube lug where it meets the head tube, like maybe a collision?
Anyway, nobody can tell you based on pics you showed. We need to see lugs and under the bottom bracket, at least. Most Colnagos will have club cutouts in the fork crown, in the bottom headtube lug where it extends to the downtube, and cutout of the bottom bracket, amongst other places. A lot of times either a club or COLNAGO at the seat stay caps, or on the fork crown if no club. Absence of any/all of these things would scream FAKE to me.
Based on what I'm seeing, not Colnagos. But there's so much I'm not seeing, I could easily be wrong.
PS, two links may be of interest to you to compare:
https://saarf.london/2013/02/19/how-...-fake-colnago/
Colnago, main