The FedX Fallacy

The following print advertisement promoted FedX by claiming that two of UPS's trucks fit into one of FedX's.

First off, did anyone else notice that the UPS trucks are clearly a smaller model than the FedX one? In fact, they look to be the exact size if not bigger than FedX express couriers. They purposelessly chose a truck size that would fit twice despite the fact that UPS has an eighteen wheeler vehicle that appears to be a similar size.
Link To image of UPS Eighteen Wheeler
FedX misrepresented the size of UPS trucks to make it seem as if they were substantially smaller than FedX trucks when, in reality, UPS trucks are similar to the same size as their equals in FedX. This is clearly a use of the Texas Sharp Shooter.