Runway excels as a creative powerhouse for marketers who want artistic control over their video content. Its AI quality is exceptional, especially for visual effects, background removal, and experimental features like text-to-video generation. It's the tool you reach for when you want your brand content to stand out visually. Synthesia, meanwhile, is ruthlessly focused on solving one problem perfectly: creating professional presenter videos without the hassle of cameras, studios, or actor scheduling. The meaningful difference comes down to use case: Runway is about creative expression and visual effects, while Synthesia is about efficient communication at scale. If you're making 50 training videos in different languages, Synthesia wins by a mile. If you're creating a standout brand campaign for Instagram, Runway's your friend. Business professionals should choose Synthesia if their primary need is consistent, professional communication—think HR training, sales enablement, or product tutorials. Choose Runway if your marketing team needs creative firepower and you're willing to invest time learning more advanced features for that cinematic edge.