I don't know. I think they are both fine, but each has its own problems and weaknesses, both performance wise and design wise:
MBP/pros: backlit keyboard, speakers, larger display, graphics chip, arguably the metal case, doesn't scratch as easy, feels good in your hands
MBP/cons: worse battery life, worse wireless range, latch design, easily dented case, grainy display if it bothers you, hard to change the hard drive by yourself.
Macbook /pros: compact design, magnet closing mechanism, crisper display, better wireless and battery, plastic case is arguable more durable/travel-friendly, a little lighter (esp.with adapter size), easily swapped hard drive
Macbook /cons: graphics, scratches or smudges when you breathe on them, easily cracked palmrest because of the great closing mechanism, smaller display, I've had multiple units with creaking hinges because of sloppy assembly, loud fan, sharp edges
hard to say, but performance wise for everything but 3D they're similar machines. Design-wise, it's your pick which issues you mind the least...