i can tell you about 2012 cat if your interested. i have an 8m
Would love to know how they compare to the Rally - if you've had a chance. I flew an instinct light once & it was the worst kite I'd ever flown so I've been worried about this kite being too similar. Too soft on the wingtips & miserable for boosts. I've heard my assumptions were all wrong tho.
Based on the flyer above - maybe they've beefed up the leading edge due to issues with too much flutter when its loaded hard?
I haven't flown the ralley so i can't coment about that. But i did also have an 8m instinct light xc. if you hated the instinct then you will hate the catalyst they are very similar. Infact my call is the cat is a rebadged light. same style kite different name.
For me its a safe kite that is very predictable with good depower. I find it fairly boring in the mid wind range and hunker for something more dynamic.
But when the wind is stupid gusty and howling the cat is a nice beast to be flying. thats why i have it in the 8m size. 25-35 knot sessions are sweeeet. I've had one of my best sessions of the year on the cat. boosting to the moon with floaty landing and slashing the waves.
from your brief explanation i recon you should look at the C4. Its much more fun and dynamic and boosty in the 15-25knots range and i think handles waves better than the cat too.