In look vivo v9 is very much similar to iphone X BUT except selfie nothing is like iphone 4GB of RAM is quite enough for performance but system UI uses almost 1.8GB of your RAM no dout you can do daily task without without a single lag of phone but if you are thinking more from that than these phone will not made you glad its qualcom snapdragon 625 not able to handle high end game and application if you are investing more than 20 thousand in phone you dont need camera only in 20 thousand no dout camera is excellent but only camera is.