I want a D700 successor

As you yourself write, it is the job of the raw converter to interpret the data. And if it has wrong profile, it will give wrong results.

Anyway, did you try the same conversions with the latest versions of the converters in question? If Bob and noirdesir are right, the latter versions should be better at interpreting colours than earlier ones...

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Comments and critiques are always welcome .
Cheers,
Stas.