From what I read, I might go as far as saying we have some reason to think that impostor syndrome might be equally prevalent in men and women in tech. On the other hand, if research found the opposite, I could come up with a half-dozen reasons why that wouldn't be surprising.
And I didn't see anything related to impact. It could well be that in tech men and women experience it with the same frequency, but it has more impact for women (or other people easily perceived as outsiders).