The phrase "other side of the coin" is commonly used to describe an alternative perspective, situation, or opinion. However, there are plenty of synonyms that can be used to convey the same meaning. Some options include: different angle, contrasting view, alternate interpretation, opposing argument, alternative outlook, alternate perspective, and opposite take. All of these phrases can be used to describe a viewpoint that differs from the one currently being discussed or considered. Using these synonyms can add variety and nuance to your language, while still conveying a similar idea of a differing viewpoint.