Quick verdict
Choosing between Clash Royale (500M+ installs) and Clash of Clans (1B+ installs) usually comes down to workflow, not raw feature counts.
Clash Royale, built by Supercell, focuses on real-time 1v1 card battles with deck-building strategy. Clash of Clans from Supercell instead leans into build your village, train troops and battle clans worldwide. The two products are similar enough that comparing them feature-by-feature, rather than spec-by-spec, gives you a clearer answer.
This guide breaks down what each game does best, the use-cases each was designed for, a clean pros & cons matrix, and three high-intent FAQs people search before downloading. Both are free to install from the Play Store, so the real cost is your attention and habit — pick the one whose workflow matches yours.