These were anxious young pups. Big Daddy Helenius got all day - you tend to grow in sadism as the years weigh on you. That is the difference between young Foreman and old Foreman.
I can only speak for the Granat fight which I've seen, that was on cuts... Usually Orlov takes a beating before finally throwing in the towel. Only time I've seen him stopped outright was against Leapai, and he ate some massive shots that would have floored and probably stopped anyone who didn't have the absolute sturdiest of chins.
Just watched Helenius interview in Finnish tv. He said he wants either either Duhaupas rematch or Wilder this year. We will see of course.