because you asked twice....i can compare a 2510dv to a 2520dv. while i would be hard pressed to call either of these boats offshore boats I would venture further and more often in the 2510. simply due to the helm position, the 2510 rides better. and yes, i own a '02 2510dv with twin yamaha power
I have 2015 2510xld. I have driven both boats. Don't think much difference i ride. About the same. I go offshore 60+miles. I like the open cab vs going in and out the pilot house door. Much easier to get around. I love my boat