iPhone 6
Screenshot of purported iPhone 6 4.7-inch model from Marques Brownlee's YouTube video.Screenshot from Marques Brownlee's YouTube video.

Apple Inc. is venturing into big screen mobile handset for the first time with its upcoming 5.5-inch model of iPhone 6 aka iPhone Air, and with its release date drawing near, it is natural for gadget lovers to compare it with the recently-unveiled Samsung Galaxy Note 4, which is seen as its biggest competitor.

The Cupertino giant is expected to launch two models of iPhone 6, one with a 4.7-inch display and the other with 5.5-inch. Both the models are very likely to be announced at Apple's media event scheduled on 9 September before releasing it into the market after a few days.

According to reports, iPhone 6 5.5-inch model is expected to have a 2,272×1,280 (510ppi) screen resolution protected by sapphire crystal glass. It may be powered by a 20-nm A8 chip (64-bit) processor, run on iOS 8 operating system and come packed with 32/64/128 GB internal memory and 1GB RAM.

The device may have an 8MP camera, which is seen in its predecessor iPhone 5s, but with flash and Optical Image Stabilisation, and house a 2,500 mAh battery. French website iGen claimed that the bigger model of iPhone 6 may come with a dimension of either 158x77.12x7 that weighs 168.5g, or a 158.07x77.79x7.10 with 184.6g. However, The Week had earlier reported that the device might come with a super-slim frame with a depth of just 6mm.

Apple Insider reported citing analyst Ming-Chi Kuo that the iPhone 6 also might come with several features like low temperature polysilicon in-cell touch panels, Touch ID finger-print security, NFC and metal casing. Chinese analyst Sun Chang Xu claimed that the device might feature sensors that can detect pressure, temperature and humidity.

According to a report by TechRadar, the 5.5-inch variant may come with a price tag of £563 ($966). However, it is just speculation and the actual price may vary as Apple Inc. hasn't announce the pricing of its first big-screen device. 

On the other hand, Samsung Galaxy Note 4, which was unveiled on 3 September sports a 5.7-inch Quad HD (2,560x1,440) Super AMOLED display with 515 ppi (pixels density) resolution, screen is protected by Corning Gorilla Glass. It is powered by 2.7 GHz Quad-Core Processor /1.9 GHz Octa-Core (1.9GHz Quad + 1.3GHz Quad-Core) processor and runs on Android 4.4 (KitKat) OS.

The next-generation device has a 16MP rear camera with auto focus and Optical Image Stabilizer, and a 3.7MP front camera with f1.9. It comes packed with 32 GB internal memory, 3GB RAM and micro SD slot up to 64GB. Having a dimension of 153.5 x 78.6 x 8.5mm, 176g, the device houses a Li-ion 3,220mAh battery.

The device also boasts of add-on features like Download Booster, S Health 3.5, Dynamic Lock Screen, and Briefing. Its S-Pen comes with Air Command, S Note, Snap Note and Direct Pen Input updates, and sensors include Gesture, Accelerometer, Geo-magnetic, Gyroscope, RGB, IR-LED, Proximity, Barometer, Hall Sensor, Finger Scanner, UV, Heart Rate Monitoring, and SpO2.