I can't choose between iphone 5s and Samsung galaxy s4?

I can't choose, this is going to be a big upgrade for me because i currently have a blackberry which i have had for 2 years. I have never had an apple or samsung device either.

Go with the galaxy s4. I promise you its a better choice, everybody i know that had iphones have switched because the samsung galaxies are better in so many things. You can goose "iphone 5s vs samgung galaxy s4" for the reasons why the s4 is better.

IPhones just work well. If you want the operating system to get out of your way and want to enjoy the content you create on your phone and what others share with you, get the iPhone. There's no childish fonts or unneeded little pieces of junk in your way. If you're fashionable and seek sophisticated aesthetics you'll love your iPhone!

Since you're taking a leap from Blackberry, it honestly just depends on you and how open you are to new technologies. Everyone has a different opinion when it comes to the Apple vs. Samsung drama and personally if you ask me, I feel that iPhones are way better than any Samsung device. Experiencing the same confusion since I threw away my Blackberry Bold 9900 a fortnight ago and bought an iPhone 5S, I actually feel quite content with this ever-expensive Apple product and I'm especially quite happy about how fast and reliable it is.

Go for Apple iPhone 5S it comes with many new features which could be USED, it comes with a touchID which is something new above all that it comes with the new iOS 7. Advantages of an iOS is that they are easy to use, most advance in any sense and surely most secure i.e. There's no problem of Identity theft.
I'm not suggesting you Samsung Galaxy S4 because who pays $700 for plastics, it also comes with bunch of features but no one on the planet has time to use like who'll wave his his in front of a phone to pickup a call or remember this functions. It has Android Operating system, an report says that most of the phone account which were hacked were android and androids are really difficult to use.
Samsung has a Really big screen, a big screen which will never fit in your pocket and make you feel that you are showing off an iPhone comes with a cool screen which is big enough to show everything and above all it's an iPhone so it's trendy.
I have been using iPhones for an decade, when the last first iPhone came out I didn't faced any problem these people have a good customer service help which you'll love. My brother was using a Samsung Galaxy Note 2 which had some screen defect in the warranty period then the Samsung store people said "it was your fault, we won't the phone or fix the screen for free but yeah you'll have to pay $200 if you have to get it fixed".
I conclusion If you want power with precision and trendiness go with an iPhone and if you just want to make a social status that you can afford a luxury phone or an showoff use Samsung Galaxies.

Iphone has the best apps and security (no virus checker neededed like other phones have).It has imessage, siri, facetime, fingerprint access, burst mode and slo-mo camera, free radio, airdrop, call blocking, etc.
If you haven't seen the slow-mo video yet on 5S, go to youtube and check out what people are uploading.

Just to confuse your options even more.

Research the HTC 1 4G, which was recently awarded "Gadget of the Year Award"

HTC spent 12 years developing this device.
Other than a few 'petty' whines, I have yet to read anything but high praise for this handset.

Read the review at Cnet.com (and various other sites)