The Apple iPhone 6 Plus and the OnePlus 3 definitely have a brewing competition in the premium category. Below we have pitted the two smartphones' specs and features against each other in order to help you choose the best buy option.

To start with, the iPhone 6S Plus sports curved-edge panel along with the power button on the side. Then again, the fingerprint sensor is located on the front side of the device embedded in the home screen button. On the other hand, the OnePlus 3 features an aluminum chassis with a black finish. It also consists of a round home button and a fingerprint scanner on the upper side of the panel.

In terms of display, the iPhone 6S Plus features a 5.5-inch display and possesses 3D Touch display functionality whereas the OnePlus 3 sports a 5.5-inch screen with similar AMOLED display. The comparison reports have revealed that the iPhone 6S Plus and the OnePlus 3 provides you with 1920 x 1080 pixels resolution.  

When it comes to the performance-related specs, the iPhone 6S Plus is powered by the A9 chipset and 2 GB RAM, while the OnePlus 3 device sports a Snapdragon 820 processor along with a whopping 6 GB RAM. The smartphone also features 64 GB storage with no micro SD slot option. However, it features a USB Type-C port with Dash Charge technology, which enables the users to charge the battery in only 30 minutes.

Furthermore, the iPhone 6S consists of a 12-megapixels rear camera and a 5-megapixels front camera whereas the OnePlus 3 sports a 16-megapixel rear and an 8-megapixel front camera with additional features like phase detection autofocus, OIS and LED flash.

The Apple iPhone 6 Plus runs on the iOS 8 software, which is upgradable to iOS 10.1 with non-removable Li-Po 2915 mAh battery. On the other hand, the OnePlus 3 phone features the Android 6.0 Marshmallow operating system and non-removable Li-Ion 3000 mAh battery.

Lastly, the iPhone 6 Plus has been priced at $649 whereas the OnePlus 3 is available for $399. If you're after the iOS phone, then try also looking into the latest iPhone 7, but if you're after budget at comfortable specs, then the OnePlus model will be fine.