IMO, of the two, the Morphmarket calculator is the better.
I did some experimentation with the OP's five gene pair problem. Both calculators gave the right answer to the problem. The major difference was that the Morphmarket calculator gave both genotypes and morph names, while the WOBP calculator only gave morph names. Other differences were relatively trivial.
WOBP calculator has a hard time calculating hets too
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"I'd rather be hated for who I am, than loved for who I am not" -Kurt Cobain