I had a 6+ so I guess spec and camera wise it can't compare.
However, I can comment on the screen size, form factor, and face id.
Screen: I guess it could use more width like my 6+ but after using this phone for two days I already forgot about it and it doesn't bother me. I don't watch movies, just youtube video here and there and the notch doesn't bother me. The landscape mode still works with texting and several apps, just wish the home screen still had flipped to landscape mode (I use that in my car, again, not a deal breaker). OLED is beautiful, I turned off true tone as I prefer the cooler colors.
Form: Very welcomed. My main photo / video taker so its easier to hold, even with my case. The almost bezels display is stunning and I find myself just checking it out from time to time.
Face ID: I like it better than touch id. I have sweaty fingers so touch id was always hit or miss with me. Face ID is quick enough and a nice feature. Especially in the cold months like now (for my region at least) wearing gloves outside and trying to open my phone is easier now.
I hate the price, but I mentioned before I can afford it, will keep this for a while, and I have a minimalistic approach (only other apple device is a retina MacBook so having no apple watch or iPad saves me money in that matter).
Was not impressed with the keynote, but now that I have it in my hands I changed my mind and welcome the X. Good luck with whatever you decide.
