Skyman very few commercial airliners have a better field performance than the757 it was designed for hot and high operations and is delightfully overpowered and overbraked for most operations a real dream ship.The 738 is a good aeroplane but not in the same league performance wise it is nearing the limit of the designs stretch capability ,it has less braking capability and comparitively high approach speeds to address tail ground clearance issues.They are both great aircraft as always from Boeing!!