Replying to Scratch vs 1080 - opinions

I just got 1080's (the fizz 161) last saturday. I kept telling the guy I wanted the scratch (168) but he said they were too long, and stiffer than the 1080 for my height and weight (5'4, 115 lbs). So, i got the 1080s because he said there was some 7 ski day guarantee and that if I didnt like them i could take them back before I skied on them 7 times. Ive tried them once, and im really comfortable on their size so I think i could go for that extra 7 cm in the scratch. I was just wondering if it was really worth switching to the scratch - or to stay with the 1080's.