Hope this comparison helps in deciding what to buy.
OnePlus 7 Vs. OnePlus 7 Pro - Specifications Comparision: OnePlus 7 Pro OnePlus 7 Display 6.67-inch Fluid AMOLED (~88.1% screen-to-body ratio) 3120x1440 pixels resolution (19.5:9) (~516 ppi density) 90Hz, HDR10+ Gorilla Glass 6 protection 6.41-inch Optic AMOLED (~85.5% screen-to-body ratio) 2340x1080 pixels resolution (19.5:9) (~402 ppi density) Gorilla Glass 6 protection Build Front/back glass, Aluminum frame Front/back glass, Aluminum frame Chipset Qualcomm SDM855 Snapdragon 855 (7 nm) Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.80 GHz Kryo 485) CPU Adreno 640 GPU Qualcomm SDM855 Snapdragon 855 (7 nm) Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.80 GHz Kryo 485) CPU Adreno 640 GPU RAM 6GB/8GB/12GB 6GB/8GB Storage 128GB/256GB 128GB/256GB SIM Dual SIM (Nano-SIM, dual stand-by) Dual SIM (Nano-SIM, dual stand-by) MicroSD card slot No No Rear camera 1 48 MP, f/1.6, 1/2", 0.8µm, Laser/PDAF, OIS 48 MP, f/1.7, 1/2", 0.8µm, PDAF, OIS Rear camera 2 8 MP, f/2.4, 78mm (telephoto), 3x zoom, Laser/PDAF, OIS 5MP, f/2.4, 1.12µm, depth sensor Rear camera 3 16 MP, f/2.2, 13mm (ultrawide) No Front camera Motorized pop-up 16 MP, f/2.0, 25mm (wide), 1/3.0", 1.0µm 16 MP, f/2.0, 25mm (wide), 1/3.1", 1.0µm Connectivity Wi-Fi ac 2x2 MIMO, Bluetooth 5.0 AptX HD, LDAC, NFC, A-GPS, USB 3.1, Type-C 1.0 reversible connector, USB On-The-Go Wi-Fi ac 2x2 MIMO, Bluetooth 5.0 AptX HD, NFC, A-GPS USB 3.1, Type-C 1.0 reversible connector, USB On-The-Go Speed HSPA 42.2/5.76 Mbps, LTE-A (5CA) Cat18 1200/150 Mbps HSPA 42.2/5.76 Mbps, LTE-A (5CA) Cat16 1024/150 Mbps Audio USB-C, Stereo speakers USB-C, Stereo speakers 3.5mm jack No No Battery Non-removable Li-Po 4000mAh Non-removable Li-Po 3700mAh Charging USB-C 3.1 Fast battery charging 30W (Warp Charge) USB-C Fast battery charging 20W Operating system Android 9.0 (Pie); OxygenOS 9 Android 9.0 (Pie); OxygenOS 9 Water resistance No No Security In-display fingerprint In-display fingerprint Dimensions 162.6 x 75.9 x 8.8mm 157.7 x 74.8 x 8.2mm Weight 206g 182g Colors Mirror Gray, Nebula Blue, Almond Mirror Gray, Red Price ₹48,999 (6GB RAM + 128GB Storage) ₹52,999 (8GB RAM + 256GB Storage) ₹57,999 (12GB RAM + 256GB Storage) ₹32999 (6GB RAM + 128GB Storage) ₹37999 (8GB RAM + 256GB Storage)Xiaomi Mi Max Prime with 4G RAM and 128GB ROM Will Go On Sale for ₹ 19999
-

Xiaomi launched a big screen phablet smartphone Mi Max Prime at a price of ₹ 19,999. The handset offers some pretty top notch specifications at a price under ₹ 20K. Though it has many similarities of Mi Max but it has got better specs such as Qualcomm 652 SoC, 4G RAM, and 128GB internal storage space.
Mi Max Prime Specifications:
Mi Max Prime is definitely a phone worth keeping an eye on. It is the company’s biggest smartphone with a size of 6.44 inches. The phablet is powered by Snapdragon 652 coupled with 4G of RAM and 128GB inbuilt storage. However, if you consider Mi Max, it is powered by Snapdragon 650, 3GB of RAM and 32GB storage.

The new Mi Max Prime with Snapdragon 652 has two additional high-performance Cortex-A72 CPU cores. This octa-core processor power, when combined with an extra GB of RAM and whopping 128GB internal storage space, gives a big push to the giant phablet.
The phablet supports a 16-megapixel rear camera with ultra-fast PDAF focusing and 5-megapixel for the front camera. Moreover, the handset offers finger print recognition for higher security and faster unlocking. Connectivity wise, the device supports 4G LTE with VoLTE in bands 1/3/5/7/38/39/40/41, Wi-Fi, Bluetooth 4.2 LE etc. Mi Max Prime available in Dark Grey, Gold and Silver colour options runs on Android 6.0 Marshmallow with MIUI on it and backed by a 4,850mAh battery.
Idea Xiaomi Mi Max Offer:
Xiaomi Mi Max has got a bundled offer with Idea Cellular that makes the phablet buyer will get double data. Under this double data offer, Mi Max Idea subscriber should recharge his/her mobile number with ₹ 453. Both the new and existing Idea customers can avail this offer on the purchase of Xiaomi Mi Max and Xiaomi Mi Max Prime handsets.
Double data benefit of 4G has a validity of 28 days. The subscribers can use this Idea Xiaomi Max Offer recharge for a maximum of 12 recharges only. All the Idea subscribers can enjoy 3G/4G double data except in the states of Assam, Bihar, Mumbai, Rajasthan and West Bengal where the only 2G is applicable.
Xiaomi Diwali Sale:
Apart from this handset launch, the Company has also announced that Xiaomi would start Diwali Sale from October 17th to 19th, 2016. Stay tuned for comprehensive information on additional deals offered by Xiaomi. One can grab this phablet on October 17thwith many more attractive offers.