In closing, I'll part with a metaphor too. The MacBook is a Toyota and the MacBook Pro is a Ferrari. Sure, if you're just driving down the highway they'll both get you there, but the Ferrari can go 150 when you need it to, and it has a lot of little extras that help make up for the cost difference.
If the MacBook is a Toyota it's going to be a very quick one because it's got the same engine in it as that Ferrari.