For English speakers, watching with subtitles preserves the original cast’s emotional delivery. Dubbing, while convenient, often flattens the rage and whispered threats that define Elena’s character. Subtitles allow you to hear the "cómo te atreves" (how dare you) while reading the precise translation—a much richer experience.
If you are deciding whether to put in the effort to find it, here is a quick review guide: escandalo relato de una obsesion english subtitles