I owned a F150 Yamaha 4-stroke and the 150 HPDI would pass me every time.

I vote HPDI but, if you are not worried about speed the F150 is a very dependable outboard motor.

I currently have a Yamaha Vmax 175 HPDI on a 19 foot Bass Cat Pantera Classic and if, I dont get over 4500 RPM's it gets as good a gas mileage as the F150 that I owned. Just saying !!