I'm actually with you, sarki7 - I don't think the differences between the two are really all that significant. It's my opinion that a couple of things came into play here. First, a dark ride like Pooh fits into Fantasyland, where rides like Pan and Snow have been popular for decades. That type of simple attraction just doesn't seem to fit anywhere else. Also, Pooh was put in at the expense of the Country Bears, and I don't think SoCal visitors have ever forgiven Disney for that. Of course, in Florida Pooh took the place of Toad, but that was more of an even replacement - a dark ride for a dark ride. In DL, however, a full-blown AA spectacular was replaced with a simple dark ride, which just doesn't seem to sit well.
But as to the ride itself, not really that much diff.