No, the iPhone 6s is a slightly different assembly. I made the mistake of buying a 6s assembly for a 6 phone. Had to wait on repair while exchange part shipped! Got mine from Amazon.
I have dis-connected and reconnected several times with the white line appearing each time. The screen however seems to be responsive. I did lose a 1.2 mm screw. Is it the missing screw or did I damage the digitizer connection?