The only difference with the retail version is the grilles and taillight panels aren't already pressed in. Everything else appears to be the same as the Auto Show giveaways.
Super simple, perfect first kit especially for younger kids. Box says 6+ I'd say you could go even younger than that. It can be built 100% by the kids without adult help, no tools necessary.
I did a quick little video this morning about it. - http://youtu.be/kj0bp2nIsCk
We did a Make n Take event over the weekend with these, they were a big hit! Here's mine, of course I lowered it a little. Doesn't roll so smooth now, but it does look better...