Oppo F7 vs Vivo V9: Which one to buy

The Oppo F7 runs on Color OS 5.0 based on Android 8.1. The Vivo V9 runs Android 8.0 Oreo operating system skinned with FunTouch OS. RAM and storage. The Oppo F7 comes in two storage options -- 4GB of RAM with 64GB ROM and 6GB of RAM and 128GB ROM. The Vivo V9 has only one variant ...
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