FYI, Massimiliano, you may be confusing two different concepts: the color transform and the gamma encoding (1D functions). The color transform may be matrix-based, or table-based. The gamma encoding can be polynomial-based, or table-based.
Both ICC profiles that you sent me actually use matrices for the color transform, so these are both considered matrix-based profiles.
However, one of the profiles uses a polynomial gamma encoding, whereas the other profile uses a table for the gamma encoding.
So, the underlying issue here actually is not matrix-based vs table-based for the color transform itself, but rather polynomial-based vs table-based for the gamma encoding.
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