I have an iPhone4 and the mrs has an iPhone5, the 5 is way smoother and technically better, obviously a bigger screen. The one major downside to the 4s is the chargers, theyre shit to put it simply. The 5s charger is improved 100%!! And overall speed, whether on Wi-Fi, 4G or anything is far superior.
On the other note, ive no experience with the Samsungs - but i love their TVs lol