Xperia 1 III or 1 IV

Hey everyone,

Long time user of the 5 II and I think it's time to upgrade. I've been contemplating of getting the 1 III but with the 1 IV released, I've had the sudden shift of going for 'newer is better'.

Both have so-so similar specs apart from the variable zoom lens on the IV and I was wondering if I could get your input on what to get.

Let's say both are priced the same. Which phone would you go for?