What do you like about the 6T? How's it better in many ways?
Entirely subjective.
-Fast charger in the box is a huge plus and is quicker than the 30W fast charger from Apple, sold separately
-True physical dual sim phone and not e-sim crap where you have to rely on carrier support
-Longer battery life
-FAR better cellular reception than my (Intel) XS, never have to use WiFi calling in my apartment
-Ability to truly adjust white point / full control over screen color and tint if need be
-Ability to hide the teardrop "notch" without sacrificing really any screen real estate + notifications / status bar icons remain above the screen area
-Full screen immersive mode in Chrome / no icons or nav bar
-Dark theme
-Hardware toggle button for notifications (ring, vibrate, silence all)
-8gb memory vs. 4. OnePlus actually makes use of it for optimization of apps
-128gb storage in base model vs. 64gb
-$580 vs. $1000
Those are just a few things. That said, I fully realize that if I have a technical issue with the phone I am pretty much SOL and probably can't rely on OnePlus support. Pales in comparison to Apple support. I've never had a catastrophic phone failure, ever. That's also why I always own two phones.