I always liked the tech aspects of the 2110 cc - 82mm throw crank and 90.5 P&C. The 2332 is 84 mm crank and 94 mm P&C. The 2210 just seems more depenbable with less chance of over heating.
A 1915 often is an economy "performance" build with just the larger 94 mm P&C and all else stock. I'm sure on the 2332 there is a performance cam, better heads with bigger valves, bigger carbs and a performance (larger diameter) exhaust. Perhaps even extended sump and remote filter and oil cooler.