I think FDX likes a very light, humorous commercial geared toward younger folks (hence the Space Office with "The Final Countdown" playing as the delivery shuttle lands) while UPS tends to advertise more toward an older, conservative, perhaps more serious audience. While the whiteboard guy needs to get a haircut, I do like the ads because they aren't in-your-face but subtle and end in a bit of humor (like not being able to pronounce that city in China).

The FedEx "Caveman" is one of my favorite Super Bowl ads of all time, but the UPS "Race the Truck" ad with the jet engines on the package car was pretty clever.