The recently released iPhone models, iPhone 6 and iPhone 6 Plus, surprised critics and tech reviewers with their advanced features and latest technologies. Also, the smartphones had an impressive sales record, selling a combined total of 10 million units in just three days upon their release.

However, some analysts predict that the upcoming Samsung Galaxy S6 will steal a healthy portion of Apple's spotlight.

At the very least, the latest Apple iPhones will have a formidable rival in the market, as the Galaxy S6 is set to launch soon. It is said that the upcoming Android phone from the South Korean tech giant will have features that could overshadow the latest Apple phones.

For prospective buyers, here is a comparison between the features of Apple's iPhone 6 and Samsung's upcoming Galaxy S6.

Design

Apple's iPhone 6 sports an aluminum casing similar to the other smartphones by Apple, but has thinner built and rounded edges.

Samsung's Galaxy S6, on the other hand, is rumored to be packing a metal casing, since Galaxy Alpha, one of Samsung's recently released smartphones, comes with a metal body, unlike the usual plastic cases of previous Galaxy S models.

Screen Display

The iPhone 6 comes with a full HD resolution 4.7 inch screen panel, while Galaxy S6 is rumored to be coming with a larger screen panel with a 4K pixel resolution.

It is also expected that Galaxy S6 will have a Super AMOLED screen at a higher resolution than the Galaxy S5, since Samsung stated that the tech company wants to keep improving screen resolutions.

Processor

While iPhone 6 comes with a 64-bit A8 processor and a supporting M8 graphics co-processor, Galaxy S4 will reportedly be powered by a 64-bit Qualcomm Snapdragon 808 or 810 with an Adreno 430 graphics chip that would support high resolution images and videos.

Operating System

The iPhone 6 runs with Apple's latest operating system, the iOS 8.

On the other hand, rumors say that the Galaxy S6 will come with Android 5.0 L.

Internal Storage

With Apple's iPhone 6 coming with storage options of 16GB, 32GB and 128GB, Samsung will most likely be offering massive internal storage with an additional external storage option.

Battery

Apple's iPhone 6 is packed with a battery that can reportedly last up to 14 hours, while Galaxy S6 is rumored to be coming with a battery that is 30 percent more efficient than the previous Galaxy S handsets.

While iPhone 6 and Galaxy S6 may have features that resemble each other, it is expected that their companies will not make devices that are virtually the same, given the fact that the two companies rely on different aspects to gain loyalists. Samsung Galaxy S6 will likely come with better processing power and longer battery life, iPhone 6 will rely on a better application ecosystem and a smoother operating system.