I guess it depends on what pitch prop is fitted - in the same way that the towing pull of a vehicle depends on the gearing. A relatively low powered 4x4 in low range would generate a higher drawbar pull (thrust) than a Ferrari with maybe 5x the power, and likewise a fine pitched prop (like the "Saildrive" aux motors some companies make) should generate a higher thrust than one fitted with a conventional prop designed to push a smaller boat at a higher speed.
Probably not the answer you wanted though
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...
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