Size vs battery life is your real subjective consideration. The ss is sleek small and light but your giving up battery life and esp if you go lte often. The ultra your giving up size its a chunky one. That said the ultra is the king of battery life on Bluetooth or lte. So it’s style vs raw function.

I say that as some one who is currently sitting on the same fence as you. I have a s5 and it’s just seen better days and it’s time it moves on. That said s9 lte vs ultra 2 is a tough call.

Wow I get like 14 hours tops with built in apps and ao on low for a series 5. Before the update I was at 18 hours give or take. Glad you’re having success. I just wished Apple could compare and contrast why yours is so amazing some of us are getting hit.