Apple's iPhone 5 materials used to create their products are still the best. Around 20% thinner and lighter than the iPhone 4S, the iPhone 5's glass and aluminum monolith, from design to construction protects the iPhone well. It simply outclasses Samsung's plastic river stone because those types of material tend to break faster. Apple wins in the style category.
When it comes to performance, it's difficult to compare Apple to Samsung. The iPhone 5 has the brand new Apple A6 processor, which they simply cite as being twice as fast as last year's Apple A5. Samsung’s 1.4GHz Exynos quad-core will likely be every bit as impressive as the apple A6 processor. I view it as a tie between the two when it comes to the processor category. Both run extremely well at an incredible pace.
Both the iPhone 5 and the Samsung Galaxy S3 have a GPS. Also both go up to 802.11n Wi-Fi at 5GHz and Bluetooth 4.0, both can support ultra-fast 4G LTE. Honestly the numbers and fancy names mean nothing. Both phones can execute the same type of processes, have the same applications, and also do the same thing as each other. You might want the phone because everything else that you own is either Samsung or apple. At the end of the day it comes down to a personal point of view and a personal taste of the phone you might “think” is