When two boats share the same hull type — in this case both the Parker Boats 2510 XL Walkaround 2013 and the Parker Boats 2530 Extended Cabin 2011 are modified vee designs with fiberglass construction — 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?
The power gap is worth calling out. Rated to 500 hp, the Parker Boats 2530 Extended Cabin 2011 has a 50-hp advantage over the Parker Boats 2510 XL Walkaround 2013's 450-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Parker Boats 2530 Extended Cabin 2011 carries 173 gallons versus 156 gallons in the Parker Boats 2510 XL Walkaround 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 7 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 Parker Boats 2530 Extended Cabin 2011 and its 500-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Parker Boats 2510 XL Walkaround 2013 with its 450-hp rating is the more economical daily driver.