Both the Weld-Craft ECONO 2011 and the Weld-Craft RS 42 (15 ft.) 2009 are flat-bottom 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?
The Weld-Craft RS 42 (15 ft.) 2009 tops out at 25 hp. Engine specs for the Weld-Craft ECONO 2011 aren't listed - confirm with a dealer before selecting an outboard.
Bottom line: The Weld-Craft ECONO 2011 and Weld-Craft RS 42 (15 ft.) 2009 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.