The short version
Xuan Phuong is low rise western Hanoi, made up of villages, schools and scattered new housing rather than one finished centre. It offers a quieter domestic scale than the central districts, but convenience depends heavily on the exact road and on how often you need to leave the area.
The older lanes are the most distinctive part, with local shops and a slower street pattern. New developments bring more predictable buildings but can sit apart from those routines. Walk from a prospective home to food, transport and school before deciding. The route matters more than the estate brochure.
This is a sensible choice for someone working nearby and a difficult one for a daily central commute. I would live here for a house or larger flat, not because it is an easy substitute for the inner city.