Reply by BlankMan

Tdog, the 350 and 365 are exactly the same. Pull up the parts breakout on DeWalt ServiceNET and you get the exact same documents for both. The X means X-series that included the 5 year warranty. The number change came right around the time of a price hike, don’t know if that was the reason though, you’re paying more because it newer. :-)

-- -Curt, Milwaukee, WI