The difference being here... a rebuild is not a fixed thing. There is no pre-determined time, length, etc. So everyone here talking about "Can't stop mid-rebuild, can't screw things up mid-rebuild, can't stop the rebuild early, have to let it play out the "full time or distance" all sound a little silly, IMO. You can't apply any kind of fixed data to it in any real way. Bedard is the closest you'll get to a fixed data point, and even that's not a guarantee.
A rebuild can take 2 years, 3 years, 5 years, 7 years, or who knows how long. It's entirely dependent upon the players. If every player hits, this team could be in the WCF, or winning a Cup, as soon as they're all in the NHL. If all but Bedard bust, they could still be in rebuild limbo 6 or 7 years from now. Then there are the surprises or late bloomers that figure it out, that you may have gotten in later rounds. Then throw in FA signings and such...
I hate when people act like there's some sort of pre-determined time that needs to pass for a rebuild to be successful, because the truth of the matter is... there's just no way to actually predict it. It can be short or long, depending upon the players, and how well of a job the scouting department did. The rebuild is complete, when the rebuild is complete. It doesn't matter if that's this season, 2 seasons from now, or 6 seasons from now. It happens when it happens.