I keep reading how much better the camera on the Xr/Xs/Max is than the X. In my testing, I think the key thing is the newer phones use HDR pretty much all the time. I turned off the “Auto-HDR” on my X because I wanted more control over when it’s actually used. What I noticed is on scenes where it’s needed, the Xs will use it but the X doesn’t (it seems to only turn on in extreme cases) so you get drastically different photos. If you manually enable HDR on the X, the pictures are extremely close and you also lose some of those “washouts” you see when comparing the two. I personally didn’t see a significant difference, especially enough to consider upgrade/downgrading from my X.