The Hunter 260 production started on August 1, 1997 for model year 1998. There were still a few of the 26 hulls still in the manufacturing or production line. If you can provide a hull number, we can advise if either 26 or 260. After HUN IN THE HULL NUMBER IS THE MODEL NUMBER.
AS for the factory supplied rudders based on the manufacturer, they are the same.
The major differences of the 260 from 26 include optional wheel steering, upgrade forward hatch, marine head vs ports poti, fixed fresh water tank, improved entry into cockpit from water , etc.
The 270 was the fixed keel version vs water ballast with a 10 Hp inboard diesel being offered as an option. Both the 260 & 270 were introduced by me