How so? They are essentially the exact same machine. The only added hardware performance is an extra 2GB of RAM in the Macbook Pro, which you can upgrade yourself (for cheaper) in the Macbook. Every extra feature the Macbook Pro offers is moot, because each one seems nearly irrelevant to the majority of people who use computers.
- 2GB of RAM is more than sufficient for everyday multitasking like listening to music, web browsing, and writing e-mails and papers.
- Firewire may be X times faster than USB 2.0, but it is going the way of the dinosaur. Many firewire based devices are also more expensive than their USB 2.0 counterpart.
- The SD card reader is good for people who are camera happy, but once again most cameras offer USB 2.0 connection.
- The battery indicator light on the side is pretty much comparable to cars with underbody light kits.
- Having a backlit keyboard is good for people who don't know where keys on a keyboard are located i.e. less than basic typists.
- The glass screen is absolutely gorgeous in optimal conditions, but in most conditions it becomes a nuisance (why do you think Apple offers an antiglare option for the higher end/larger models?).
- It is very debatable, much more so than the other features, whether the aluminum unibody is superior. You can list many pros and cons for aluminum and polycarbonate regarding strength and durability, heat dissipation, radio wave signal disturbance, proneness to cosmetic damages, etc. As far as I can tell it comes down to visual and tactile preference.
I'm not saying the Macbook Pro is a terrible machine, far from that in fact, but it's just not vastly superior to the $150 (technically $200) cheaper Macbook. Some people may use all the extra features, and in that case I'd say go for the Macbook Pro. Otherwise I'm standing strong to my opinion.