I personally don't have much experience with Sony Ericsson phones. To me, all Sony electronics (outside of the PlayStations) are always just good, but also always at a price premium, and there is usually better value to be found with another brand. (I will concede that many of their recent products, however, actually feels like they are the best in class again.)
Sony phones are no exception to the rule. I've only seen one Sony phone out in the wild (outside of the Persona 5 anime, where apparently every phone is made by Sony). It was good, had everything I wanted on a phone, but nothing really stands out about it outside of its small size. You would think the company that supplies everyone's camera sensors and makes the best mirrorless camera would, by logic, have the best camera phones as well, but again, nothing about them really stands out.
In conclusion, always good, never exceptional.
Also, last 2 cents, I just can't take the name "Xperia One II" seriously.
I'm currently using 5iii and xz1 compact. I really like the old school design, the inclusion of SD cart slot and headphone jack, and it's easy to unlock. However, the update policy is bad (2 yr OS + 1yr security) especially when you factor in the price, and the availability is limited to select markets only.
Here are some stats. First is Android upgrades. The second is security updates.
Samsung 4 years 5 years
OnePlus 4 years 5 years
Oppo 4 years 5 years
Google 3 years 5 years
Xiaomi 3 years 4 years
Motorola 3 years 4 years
Realme 3 years 4 years
Vivo 3 years 3 years
Nokia 3 years 3 years
Sony 2 years 3 years
Here are some stats. First is Android upgrades. The second is security updates.
Samsung 4 years 5 years
OnePlus 4 years 5 years
Oppo 4 years 5 years
Google 3 years 5 years
Xiaomi 3 years 4 years
Motorola 3 years 4 years
Realme 3 years 4 years
Vivo 3 years 3 years
Nokia 3 years 3 years
Sony 2 years 3 years
Here are some stats. First is Android upgrades. The second is security updates.
Samsung 4 years 5 years
OnePlus 4 years 5 years
Oppo 4 years 5 years
Google 3 years 5 years
Xiaomi 3 years 4 years
Motorola 3 years 4 years
Realme 3 years 4 years
Vivo 3 years 3 years
Nokia 3 years 3 years
Sony 2 years 3 years
Here are some stats. First is Android upgrades. The second is security updates.
Samsung 4 years 5 years
OnePlus 4 years 5 years
Oppo 4 years 5 years
Google 3 years 5 years
Xiaomi 3 years 4 years
Motorola 3 years 4 years
Realme 3 years 4 years
Vivo 3 years 3 years
Nokia 3 years 3 years
Sony 2 years 3 years
Here are some stats. First is Android upgrades. The second is security updates.
Samsung 4 years 5 years
OnePlus 4 years 5 years
Oppo 4 years 5 years
Google 3 years 5 years
Xiaomi 3 years 4 years
Motorola 3 years 4 years
Realme 3 years 4 years
Vivo 3 years 3 years
Nokia 3 years 3 years
Sony 2 years 3 years