What are some differences between portraying a married couple in a superhero comic vs. a slice-of-life comic?

In superhero comics, the couple's relationship is often a subplot supporting the main narrative of the superhero's adventures. Their emotional lives are often secondary to their superhero duties. In slice-of-life comics, the couple’s relationship is the central focus. Their daily lives, joys, sorrows, and challenges are explored in detail. The portrayal will likely be more intimate and character-driven, prioritizing emotional depth over action.