It's not necessarily about enjoyment, as it is about reading what the author wrote as opposed to what the translator wrote. But this also means that sometimes, the translated work is a good work in its own right and worth reading (Borges once said "The original is not faithful to the translation"). So, it really depends on a lot of things. But for Marques in particular, his works are very tied to Spanish culture so even as an outsider, learning Spanish and reading the originals still isn't quite the same as reading them as a Spaniard.
For instance, reading a translation of the Da Vinci Code, Hunger Games or Harry Potter, you're probably not missing out on anything. Reading translation of pretty much all poetry, you're missing out on everything.
There's a whole spectrum there in between.
Similarly, I had a copy of Rimbaud's works which I was completely in love with. I moved back to the US and for the life of me cannot find the same translation. The ones I have found are somewhat limp in comparison.
One day I would like to learn both French and Spanish well enough to read Borges and Celine in their original, if for no other reason than to see if the Journey I know is that much different than the original.
I wonder if the Count of Monte Cristo is even better in French.
You could also read all the great authors in your native language in that time, or “suffer” the translations.