There is a LOT more to towing than just trailer weight. Frontal surface area (wind resistance), sidewall surface area (sway inducement) and length of the "lever" from the rear axle of the tow vehicle to the hitch ball and from the hitch ball to the trailer axles will all make a significant difference in what you can comfortably tow, safely tow, mechanically tow (yes those three are not the same either).
What you're asking is if you can tow a "large front surface area" RV with the same horsepower/torque that is needed to tow a small flatbed trailer that both weigh the same "5000 pounds"... The answer is, "No you can't tow the same "weight" trailer regardless of "size/style"......
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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