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This is either Anthocharis belia or Anthocharis euphenoides. Tolman gives euphenoides as a sub species of A belia but more recently it has been accorded species status in its own right.
Distribution of euphenoides is throughout Iberian peninsla and on mediterranean coast of France. A belia is found in N Morocco, Algeria and Tunisia. The location of this observation in Tarifa, Spain is very close to Morocco so location is probably not a helpful guide to which species this is.
Yes the species are very similar ,in most images that I have seen of A.euphenoides males appear to have a more pronounced black spot on the wing .Images on websites can't always be trusted though and as they are both called Moroccan Orange-tips ,that is probably the safest ID.
Lat/Lng: 36.0299, -5.6035