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Even if we're talking the Turbine PA46, I think we're also talking chalk and cheese here.
About the most insightful thing I could say based on what we have here is that even at the lowest vs highest configurations (e.g. BE90 vs PA46-500TP) One costs considerably more to run than the other, I'm sure anyone who has managed to navigate to a website on the matter can resolve which is which.
I don't mean to be condescending to the OP but there are potentially huge variables in missions and budget here.