Correct they use the Roman Rite, in most places according to the Ordinary Form, in a. few places according to the Extraordinary Form. They of course have their own calendar of saints, that includes most of the main saints on the General Roman Calendar, and their own, while downgrading some saints on the GRC to optional or not observed.
Musically though, they have their own Propers OSB in the Graduale Romanum, for their own propers of saints, but their own proper Order for the deceased (vigil, requiem Mass, etc.), and their own propers melodies for the Holy Thursday Mass of the Last Supper (for example the Ubi Caritas is in mode VIII for the OSB propers, and in Mode VI for the Roman Rite).
For the Liturgy of the Hours, there are 5 main schemas in use in the post-Conciliar Office: Schema A is the original Benedictine schema of St. Benedict that distributes the psalter over one week with many repetitions; ad libitum Prime can be retained, or its psalms distributed in a couple of optional schemas. Schema B is the entire psalter in one week but with no repetitions. Schemas C and D are two-week distributions. And the last schema is simply the Liturgy of the Hours, which is used in abbeys that have a lot of external apostolate work (e.g. colleges), or for pastoral reasons (small, elderly community), and is generally used by monks when they travel. And there are also a couple of home-grown hybrid schemas in a few places.
