Depend what you want to do and board you have, but 6.3 can to pretty much everything that a 5.9 can do...a bit longer on the boom, but it's not that bad. Sometime, you are better with a 5.9 VS a 6.3....usually it is when the recommanded mast is shorter, less mast, lighter...and lighter gear can get on a plane sooner...or the draw back of sails size worth it.
Good luck.
Nord_roi
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PeteG said...
Thanks for your help guys!
Makes a decision much easier!