Had run both (community and official) about equal period (24 hours) as a main phone (can't use SailfishX in everyday use yet, as I need internet connection sharing through wifi) and the result is similar to yours.
When wifi was used with community port, the battery charge decreased quite quicly, but using 4G connection the battery life was really good.
When official build was used, then leaving it overnight (4G on, 8 hours) the charge went down from 13% to 4% and after the alarm sounded, it was 3%.