There is a story in the numbers
2007 iS133 is 80cm wide and real volume was 127 litres. Tail width 54cm. 7.8kg weight. Heavier, softer and older design.
2011 iS117 is 80cm wide and volume 117 litres. Tail width 52cm. 6.2kg weight. Carbon much lighter, stiffer and newer design.
iS117 carbon will be faster, plan similar to 07 iS133, more control in rough seas and gybe better for sure.