Yes and no.
Yes - The skills of IF in the body of LC can be able to channel a pretty devastating chi-fueled blow. The amalgamation can win.
No - if WW fights to the best of her ability, meaning a combo of high skill, super speed that is top tier, and with strength levels that make Colossus seem weak ....then obviously WW wins.
So, like most fights, it depends. Are we using the version that was sparring 'evenly' with Batman (IF/LC win quite handidly), or are we using a version that was fighting evenly with a Superman who thought she'd killed Lois (IF/LC die badly), or are we using a version that is simply out to kill and is bloodlusted (IF/LC die well ...since it will be fast).