Display

Nubia Red Magic 3: 6.65-inch full-HD+ HDR 90Hz AMOLED display Asus ROG Phone: 6-inch full-HD+ AMOLED display Xiaomi Black Shark 2: 6.39-inch full-HD+ AMOLED display Display-wise, the Nubia Red Magic 3 wins as it has a bigger, brighter and a smoother screen among the three. While, Asus ROG Phone and Black Shark 2 also come with Full HD+ resolution displays, the refresh rate on the Nubia is better.

Processor

Nubia Red Magic 3: Qualcomm Snapdragon 855 SoC Asus ROG Phone: Qualcomm Snapdragon 845 SoC Xiaomi Black Shark 2: Qualcomm Snapdragon 855 SoC In terms of CPU, we see that the Asus ROG Phone lags behind as it is powered by Snapdragon 845 SoC. On the other hand, the Nubia Red Magic 3 and the Black Shark 2 both are powered by Snapdragon 855 SoC.

Rear camera(s)

Nubia Red Magic 3: 48MP Sony IMX586 sensor Asus ROG Phone: 12MP primary sensor and an 8MP sensor Xiaomi Black Shark 2:  48MP primary sensor and a 12MP secondary sensor Asus ROG Phone and the Black Shark 2 comes with dual rear camera setup on their back panels, while the Nubia Red Magic 3 only has one 48MP rear camera. So, here the Black Shark 2 wins as far as the cameras of the three devices go.

Selfie camera

Nubia Red Magic 3: 16MP selfie camera  Asus ROG Phone: 8MP front-facing camera Xiaomi Black Shark 2: 20MP selfie camera In the terms of selfie camera too, the Black Shark 2 wins if we compare them according to their resolution.

RAM and storage

Nubia Red Magic 3: 6GB RAM/ 64GB storage, 6GB RAM/ 128GB storage, 8GB RAM/ 128GB storage and 12GB RAM/ 256GB storage. Asus ROG Phone:  8GB of RAM paired with 128GB of internal storage Xiaomi Black Shark 2: 6GB RAM/ 128GB internal storage and 12GB RAM// 256GB storage variant The Nubia Red Magic 3 offers more options to the users to choose from and it is the only one among the three that packs 12GB of RAM. So we would go for that if RAM was our primary concern.

Support for microSD card

Nubia Red Magic 3: Yes, up to 256GB Asus ROG Phone: No Xiaomi Black Shark 2: Yes, up to 256GB In terms of expandable storage, both the Nubia Red Magic 3 and the Black Shark 2 offer similar storage options. So, if you think you would need more storage than what is being offered, you should opt for one among the two.

Battery

Nubia Red Magic 3: 5,000mAh battery Asus ROG Phone: 4,000mAh battery Xiaomi Black Shark 2: 4,000mAh battery The Nubia Red Magic 3 shines in terms of battery life as it offers a massive 5,000mAh battery while the other two offers 4,000mAh batteries.

Operating system

Nubia Red Magic 3: Android 9 Pie Asus ROG Phone:  Android 8.1 Oreo skinned with ROG Gaming UI Xiaomi Black Shark 2: Android 9 Pie The Nubia Red Magic 3 and the Black Shark 2 both run Android 9 Pie out of the box which is a more upgraded version of the operating system as compared to the one available on Asus ROG Phone.

Starting price

Nubia Red Magic 3: Rs 35,999 Asus ROG Phone: Rs 69,999 Xiaomi Black Shark 2:  Rs 39,999 With the kind of specifications it offers, it is great to see that Nubia Red Magic 3 is priced at Rs 35,999. It is the most affordable of the lot, and we would say that if you go for it, you would be happy with it as Nubia Red Magic 3 has gaming-centric features and at the same time, it is a good value for money device.

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