I'm currently working on a search engine displaying image results. We are currently stuck on choosing the best way to display image thumbnails.
- On mobile, major search engines (Google, Bing) tend to crop image results to make them be square images (1).
- On desktop, they make them keep their original ratio and fit in a row-based grid (3).
Which layout is best for the user's experience? Why did Google and Bing make the choice to crop them on mobile?