Both the Crestliner C 2070 V 2007 and the Crestliner Fish Hawk 1750 SC / WT 2008 are modified-V designs, both built in aluminium, 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 - Crestliner C 2070 V 2007 at 20,0 ft versus Crestliner Fish Hawk 1750 SC / WT 2008 at 17,0 ft. Weight tells a clearer story for trailering families: the Crestliner C 2070 V 2007 tips the scales at 1 340 lbs - 240 lbs more than the Crestliner Fish Hawk 1750 SC / WT 2008 at 1 100 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.
The power gap is worth calling out. Rated to 125 hp, the Crestliner Fish Hawk 1750 SC / WT 2008 has a 65-hp advantage over the Crestliner C 2070 V 2007's 60-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Crestliner C 2070 V 2007 is rated for 7 passengers, while the Crestliner Fish Hawk 1750 SC / WT 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crestliner C 2070 V 2007 could be the deciding factor.
Bottom line: Choose the Crestliner C 2070 V 2007 if your priority is putting more people on the water - it handles 7 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Crestliner Fish Hawk 1750 SC / WT 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.