6"6 fish or 6"4 squash

going to Indonesia for 4 months or so and as the title sugests im unsure which board to take???
THE CHOICES:
i surf the 6"6 (Rusty Pirahana fish) pretty much every time i go so am used to and love surfing it.
i bought the 6"4 (Surftech: John Carper shaped for peter mel much more aggresive board) but have only surfed it a few times as i dont live that near the sea so at most we go surfing once a week manage to get decent surf maybe once a month.
THE ARGUMENT:
i have been surfing for about 1.5 years but because we only go every now and again most of the time in not very good conditions im still not all that good i feel confident surfing and am not worried about throwing myself into waves etc and can turn along the wave either way etc etc..... but...
i find the 6'4 alot harder to surf , got some time on it when we went on a short trip to france last year, havent really had a very succesfull time on it to be honest but in better conditions i think i could definately get to grips with it and would find it easier to learn more tricks.
i know ill be fine surfing the 6'6 even in xxxxx surf but im worried either its not the right sort of board to take (in some1 elses post people advised a fish wasnt the best of choices) or that it may hold me back learning tricks?
THE CHOICES:
i surf the 6"6 (Rusty Pirahana fish) pretty much every time i go so am used to and love surfing it.
i bought the 6"4 (Surftech: John Carper shaped for peter mel much more aggresive board) but have only surfed it a few times as i dont live that near the sea so at most we go surfing once a week manage to get decent surf maybe once a month.
THE ARGUMENT:
i have been surfing for about 1.5 years but because we only go every now and again most of the time in not very good conditions im still not all that good i feel confident surfing and am not worried about throwing myself into waves etc and can turn along the wave either way etc etc..... but...
i find the 6'4 alot harder to surf , got some time on it when we went on a short trip to france last year, havent really had a very succesfull time on it to be honest but in better conditions i think i could definately get to grips with it and would find it easier to learn more tricks.
i know ill be fine surfing the 6'6 even in xxxxx surf but im worried either its not the right sort of board to take (in some1 elses post people advised a fish wasnt the best of choices) or that it may hold me back learning tricks?