I will start by saying that these are both very good phones, but for some people the Oppo N1 is a relatively unknown phone in comparison to the extremely popular Samsung brand. Also, I have used both of these phones for a while in order to get a good feel from them and I have to say that they both have elements that makes them good purchase. By the end of this article, you will know which one has the edge on the other, but they are both quite good and that is a good note to start this comparison with.
For starters the Oppo has a bigger display than the Galaxy Note 4, but this is not something that is extremely noticeable. I do believe that if you want to have a bigger display, the Oppo will be a much better choice than the Note 4, but the speed of the response to the touch screen is basically just as fast.
The processor on the Samsung Galaxy Note 4 is more powerful than the Oppo N1 and you can see this difference when you run applications that require a lot of processing power. The Note 4 has a 2.7 GHz quad-core CPU, but the Oppo N1 has one at 1.7 GHz. That is quite a difference in performance power, but they both handle most apps well. You will only se this difference with video games that have highly demanding graphics.
The Note 4 has a 16 megapixel camera and the N1 has 14, but the quality of the photos is quite similar and so is the video.
Aside from those differences they both have the same features in general, but for stronger processing power and slightly better quality in your photos and video I would say the Galaxy note 4 is the way to go.