Sideways is sooo Barricade... it's almost like a redesign rather than a new character. And that goes right down to the wheels on the arms. I think the wheel is there because the movie model's transformation scheme makes the front wheels end up on the arms, but because they couldn't quite manage this with the toy, they came up with the (rather smart) compromise of hiding away the front wheels and bringing out a different tyre/saw combo in robot mode.
From vides I've seen, Ironhide is pretty much the same as movie one, with the exception of a few items:
1. The weapons, obviously. If you have the original mold, it looks like you can clip the old weapons onto the new figure (or the new weapons onto the old figure).
2. The colour... again, rather obviously. I prefer black.
3. The head, which appears to be a new mold.