you will have a board which feels a bit lighter and you can accelerate more. You can probably go faster and you can go with a bigger sail. Jibing will be nice as well. Probably you have to be a bit more active getting the board started when itīs really light. You need to sail a bit more technical. But teh board will teach you sailing in teh right position. You can use the 9,2 as well on the 117. With the right fin you probably will be much more competitive.
As the iSonic 117 is wider and shorter the feeling will be a bit different and you will need some hours to get into it 100%. But if your goals are to race a bit more, teh 117 will be a great choice.
Hope it helps,
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