Both the Luhrs 30 Open 2011 and the Luhrs 31 Open IPS 2011 are deep-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 - Luhrs 30 Open 2011 at 31,8 ft versus Luhrs 31 Open IPS 2011 at 34,3 ft. Weight tells a clearer story for trailering families: the Luhrs 31 Open IPS 2011 tips the scales at 13 500 lbs - 3 500 lbs less than the Luhrs 30 Open 2011 at 10 000 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 - 260 hp for the Luhrs 30 Open 2011 and 260 hp for the Luhrs 31 Open IPS 2011. 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. Both carry nearly identical fuel loads - 300 gal and 300 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Luhrs 31 Open IPS 2011 is rated for 10 passengers, while the Luhrs 30 Open 2011 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Luhrs 31 Open IPS 2011 could be the deciding factor.
Bottom line: Choose the Luhrs 31 Open IPS 2011 if your priority is putting more people on the water - it handles 10 passengers and at 34,3 ft it has the deck room to back that rating up comfortably. The Luhrs 30 Open 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.