The Triton Boats 177 2008 is a deep-V design and the Triton Boats 192 Allure 2009 is a modified-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
The power gap is worth calling out. Rated to 175 hp, the Triton Boats 192 Allure 2009 has a 25-hp advantage over the Triton Boats 177 2008's 150-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 37 gal and 40 gal - so range won't be a tiebreaker here.
Both boats are rated for 5 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: Performance buyers should lean toward the Triton Boats 192 Allure 2009 and its 175-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Triton Boats 177 2008 with its 150-hp rating is the more economical daily driver.