Both the Tahoe Boats Q4 SF OB 2009 and the Tahoe Boats Q4i 2013 are modified-V designs, both built in fibreglass, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department - Tahoe Boats Q4 SF OB 2009 at 18,0 ft versus Tahoe Boats Q4i 2013 at 18,1 ft. Weight tells a clearer story for trailering families: the Tahoe Boats Q4i 2013 tips the scales at 2 270 lbs - 600 lbs less than the Tahoe Boats Q4 SF OB 2009 at 1 670 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

Both boats share a closely matched power ceiling - 150 hp for the Tahoe Boats Q4 SF OB 2009 and 135 hp for the Tahoe Boats Q4i 2013. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Tahoe Boats Q4 SF OB 2009 carries 23 gallons versus 19 gallons in the Tahoe Boats Q4i 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Tahoe Boats Q4i 2013 is rated for 8 passengers, while the Tahoe Boats Q4 SF OB 2009 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Tahoe Boats Q4i 2013 could be the deciding factor.