Lightning is a superior physical design to USB-C (can't speak to the electrical part). Much like every major tech battle in history, however [1], the worse solution won because of ubiquity. I'm not particularly thrilled because I've had a USB-C connector irretrievably break off in a port once on a laptop but I'll make that trade for being able to use a single cable for all of my devices.
- Not an "Apple Faithful"
[1] VHS vs Beta, Doom vs Marathon, Zergling vs human, etc
I've never had trouble with usb-c, but have had lightning connectors short out and burn one of the leads, or stop working from dust. Not sure I'd say one is better than the other, but individual experience can really vary on these kind of things. Tough to say one is clearly better imo.