I think you'll find there isn't a lot of difference between a B200 and a B350. Slightly different engines (still a PT6), and the B350 is a tad bigger.
They both come with Proline 21 these days, and the new B200's rolling off the production line now are now equipped with the same environmental systems as those on the B350.
So I'm struggling to see where there's any significant difference,
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morno