I think they'll promote him more. I think that is because he is probably more radio friendly, musically, than AB is. That and the fact that he was the lead singer for Creed, one of the biggest Rock bands in the last 5 years.
Switchfoot has. Relient K so far has. I'm sure there are other artists, that I am forgetting about, who also have. It's not that difficult of a thing to do, and I think Stapp is just the right man to do it.
I admit that they do have more similarities than most. They both have deep, grungey voices, but that's about it. Very easy to tell apart, if you ask me. No way is Stapp even close to being a Vedder clone.
Oh, I have a feeling she will. She's got a strong head on her shoulders. No way will she be like all the other young girls out there. She's being raised a Rocker, and she'll be a Rocker.