Why is iPhone 5s behind in specs compared to other phones?

I've never had an iPhone and was thinking about getting one but i compared specs to other phones like s4/One and iphone is behind all these top of the line mobile devices. Why do people keep buying these phones? What makes them so special?

I don't think its behind on anything besides the size but i wouldnt want a huge phone anyway
i like the iphone because it has everything that i need its easy to use and it looks good

There not special, its called bandwagon. If one person has it, everyone has it. But i would recommend the s4 more power, more cores, sleek, long battery life

There are there on OS.
there Taking money of Brand name only
Check review at http://www.pricepaaji.com/mobiles/Apple-iPhone-5S-16-GB-price-india/14131/0

You will get little idea

The IPhones not behind… It's not ahead like everyone thinks it is though. But what are you exactly comparing? The CPU is up to date (and don't tell me that since it's a duel core it's weaker because threads have nothing to do with strength), The display is small, but high-resolution, and there are cool features on it like finger print censors.
so please be more specific because there are things that iPhones are good at and bad at.