Nexus 6p vs 5x

Hello everybody! So I've had my galaxy s4 since last January and I'm planning on changing it in a couple of months. My top 2 are definitely those 2 nexuses, but is 6p worth almost 200$ more ( equivalence in Polish currency )? What I'm concerned of when it comes to 5x is 2gb of RAM. Nowadays maybe it's enough, but in like 2 years time it might be too little. Screen size is not a factor that'd make me pay so much, because now I have 5'' and either 5.2 or 5,7'' will be fine for me. I don't want you to give me raw specs, because I know them. I want you to give me your opinion, considering personal experience, if possible.

Thank you in advance.

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