It's safe to say based on interviews with the people behind both series. Early on the producers of Lost made it very clear they had some ideas but that it was very open. The people behind Heroes seem to have a better grasp of making sure the show maintains its hook, but still wraps up enough plot lines to keep people from getting bored as well as picking up new viewers.

The HUGE mistake with Lost was taking it off the air for so many weeks. That's what killed it for many people. Some didn't come back to watch and others were expecting some big explanations in the first new episode.

I'm not sure whether to be glad or sad that JJ Abrams isn't with the show any more. Het let Alias go to complete garbage which was evident by the third season. Thankfully Lost is holding on strong right now.

I think Heroes is a more enjoyable (and creative) program than even the first season of Lost. It started really strong for me because of the similarities to Unbreakable.