Narco Police being made in Uruguay explains why it had so little to do with Dinamic's style.
I think Dinamic's style died in 1988. Since that year, almost all 8 bits games were programmed by external teams: Iron byte, Zeus software, Creep soft... I suppose they focused internal staff in 16 bits programming, but only to make the same games, nothing exclusive for big machines.
There're many more examples of Japanese arcade games being plagiarized by Spanish authors, actually, just maybe not as evident as those.
There are some more examples, like Emilio Butragueño/Tehkan world cup [>]. I suppose they took ideas about their favourites arcades. But they made straight conversions about the most succesful arcades in Spain to earn fast money, like this one.
I'm quite sure the Desperado into Gun Smoke thing was not Topo's doing, but the English publisher's. Perhaps Topo thought at some point in getting Capcom's license, but this type of agreements was always far beyond the reach of a small company like the Spanish ones. As you said, they're were locally-focused.
Topo was a company created by Erbe software, the most important distributor for the foreign videogames in Spain. They had agreements with U.S. Gold, who made the official conversions of Capcom games for European computers. I think they offered Topo games to release them in UK. U.S. Gold through Go! brand would take the rights to Capcom easily. This game was sold as a full price game, but the rest of the Topo production was sold in budget series like Kixx.