I find strix 1070 OC on amazon Germany for 380 euro and strix 1080 advance for 470 euro. Its verry good price for both gpu, but my question is its worth the extra 90 euro for 1080? There is a lot of performance differences between 1070 and 1080?
there is +/- 20 % performance difference so really up to you to decide if it is worth it. For 1080P I would be happy with the 1070. https://www.techpowerup.com/reviews/MSI/GTX_1070_Gaming_X/24.html