We both had 6 (not plus). They've held up remarkably well. But the iPhone X is simply miles and miles ahead. The battery life is unbelievable. I've been on mine since 7 AM this morning and I currently have 86% battery remaining. Isn't that simply amazing? Animoji's are fun and the screen is awesome too!
Learned a couple interesting things.
1. When the phone rings and you look at your phone, the ringer volume immediately decreases since the phone knows you've engaged the phone.
2. Since I never had Live Photos, I couldn't figure out why I wasn't hearing the shutter sound when I take a picture. It's because Live Photos also records 3 seconds of video and the shutter sound would be heard, so it's muted if you take a live Photo.
3. If you have an iPad and your phone is near your iPad, you will only get a notification sound, like from a text on one of the devices, not on both.
You're going to LOVE your iPhone X!