I have(or had seeing I haven't seen it in a while) a book where Peter was brainwashed by Arcade into thinking America was attacking his homeland. Wolverine had to fight him and learned that Peter was really, really quick...too the point where he had problems even touching Peter with his claws. The fight was never finished, but both were blood lusted.
No they werent. Colossus was rampaging, wolverine tried to stop him and got tossed that was pretty much all that happen. Thats not the best evidences sinces it was only a pannel or so and colossus was rampaging and wolverine was trying not to hurt or kill him. Also I am not even sure wolverine was written witha healing factor at the time nor his fighting skills.
This really comes down to can wolverine cut colossus deeply, if so he should win due to superior reach due to claws, superior fighting skill, superior agility, superior reflexes and combat speed however if he cant he would loses handily.
actaully they did cut him. It said colossus skin is no match for adamatium claws. It simply was not deep, but then again it was nothing but a slash.
Though after the event Logan joking slashes at colossus issues later and colossus jumps back. Colossus has also made statements liek wolverines claws would cut him to the bone, and wolverine has made statements over the year implying he believes he could cut colossus skin, colossus reaction to certain events implies heavly he believes he could as well.
It speculation on either side however. We need to see another fight to accurately assesses if he could indeed cut colossus deeply.