I think the 3.0 probably could have put out close to same horsepower if it had the variable valve timing and lift electronic control that the 3.2 has.
The 3.0 has one huge advantage over the 3.2 though. If the 3.0 blows a timing belt, no worries about bent valves.
I'm trying to save this thread from getting moved from off-topic. You're welcome.