I had the 10'8, then the 10'2 and then the 9'8..............so I know fusions
I was 120 kgs on the 10'8 and progressed down to the 9'8 at 110 kgs now I'm 103 kgs and getting something smaller.
Everything Colin told you is correct, personally I would persist with the 9'8 at your weight and age, it took me a little while to step down but its another level over the 10'2