FOWLR is definately easier because you need not moniter your nitrates and phosphates so much as fishes are able to survive even in 100ppm+ nitrates for a long period of time. For corals, you will have to moniter and maintain your nitrates below 10ppm and phosphates below 0.1ppm. Temperature wise, most Indo corals will be able to survive at ard 28-29 degC.