Compact pickups and heavy-duty pickups serve different balances of everyday space and rated working capability. A compact packages passenger travel and useful open-bed hauling into a smaller vehicle. An HD pickup is designed around more demanding load and towing configurations, often with hardware and options that would be unnecessary for a modest daily load.
Those descriptions are starting points, not specifications. A compact's suitability depends on its actual payload, trailer limits, cab, bed, and equipment. An HD truck's limits also vary by build. Compare complete vehicles for the same task rather than treating either a smaller footprint or a heavy-duty badge as a universal advantage.