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With ancient root from Asian mastiffs brought to the Iberian Peninsula by the Greek and Phoenician traders some 2000 years ago, this being directly descended from the Hellenic Mastiff of Greece, this powerful breed also has close ties with the original dogs of Molossia, in particular the legendary Epir Mastiff, from which it has inherited the uniform black and black-n-tan colorings still encountered in some modern Spanish lines.
There is a variety of types found within the breed, although the modern massive variant is standardized and preferred for Dog Shows. Mastin Ganadero is actually the least common one in Spain and most seen in dog shows,( Mastin Ganadero + English Mastiff + St. Bernard ) while the lighter working variety called Mastin Ligero, is still the most popular type!
So Mastin Ligero is much closer to these ancient dogs!

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Thank you very much. The article is very helpful. In other articles, it would be nice if the photos are taken from the same perspective so the comparison is easier to see. Thank you again.