I cannot find an iPhone 5 substitute?

Is it just in me in Singapore who can't? I can't find any other high-end smartphone that is about the same size as iPhone 5 and still as capable as iPhone 5. By "capable", I mean being able to run all apps and games flawlessly and snappily. High-end Android smartphones on the market are super capable but are just too big for me.

Can you find such a phone?