The Apple iPhone 6 Plus broke Apple's historical pattern of building small size devices when it was unveiled with its massive 5.5 inch display. Obviously competitors have crossed this display size already, so lets compare Apple's flagship with the LG G3 and see how they stack up.
The LG G3 is a beast of a device with a 5.5 inch Quad HD display, a 13 megapixel OIS camera, a 3000mAh battery and quad-core Snapdragon 801 processor. Interestingly Apple's iPhone 6 Plus is significantly larger in size despite having the same 5.5 inch display size. While it is taller and heavier than LG's flagship, the iPhone is slimmer at 7.1 mm compared to the 8.9mm thick LG G3.
While the Apple supposedly has the more premium material with its aluminum frame, the polycarbonate body of the LG G3 has a visually metallic finish which makes it look extremly beautiful and it has not faced the famous #bendgate issues Apple's large iPhone has recently come to be known for.
While the LG G3 has the better camera on paper, the iPhone 6 Plus is known to perform better when put to the test. The LG G3, on the other hand, can almost pass for a large smartphone, not a phablet, thanks to its compact dimensions, and its Quad HD screen is a beauty if you can find content suited for it. Despite that high pixel density, the LG G3 also essentially ties with the iPhone 6 Plus in terms of battery life – an important stalemate for it, as that could have easily decided the face-off.
If picking is still hard, you could consider your ecosystem of choice. Apple's iOS performs smoothly and day-to-day tasks and apps are a pleasure to use on the iPhone 6 Plus. While LG has done an amazing job with their themed Android version, the bulk of apps on Android may feel a little slower to the end user. At the end of the day the most important deciding factor may be the price, as the LG G3 is now a significantly cheaper that the iPhone 6 Plus.
source - PhoneArena