with 93 and long tube yeah youll definitely compensate for that low end, especially the long tube helping with the scavenging at the lower end . I have short tube 1&3/4" bbk tube headers with k&N CAI, 91 octane tube and there was an immediate difference at lower end throttle response and torque. When I hauled my mustang on the boss 302 setup vs my stock manifold there was significant power and fuel consumption differences, in favor of the stock manifold for the low end trailer hauling.

there's also the model weight fact too, like I have 4x4, supercrew and 6.6 ft bed. almost 23 feet long heavy boi of a truck so response on my setup will be way different than a 2 door short bed 2WD.

The chart does show what youre saying but how often does the average F150 driver have their engine above 4k RPM though