As a catechumen I am not the best to answer these questions, but I have noticed overall that there is more variation among the various Oriental (as compared to Eastern/Byzantine) Churches than among other communions. Reading through the sayings of the Desert Fathers, for instance, you will find not only Egyptians, but Syrians, Palestinians, Ethiopians, and, yes, Romans (St. Arsenius, anyone?). It is not only in the veneration of many different saints, but also in common usage, e.g., the close historical and contemporary relations between the Coptic Church and the Syriac Orthodox, whereby we have adopted a Fraction prayer of the Syrians (appropriately, “The Syrian Fraction”), and the Midnight praises prayed at Deir al-Suriani (the Monastery of the Syrians) in the Egyptian desert are prayed according to Coptic usage.
Listen to them here. Similarly, there was once the “Al-Habashi” liturgy, which was in essence an Arabic translation of the Ethiopian liturgy. That one is no longer celebrated (HH Pope Shenouda III apparently requested that the Copts stick to their own liturgies, meaning those of St. Basil, St. Cyril, and St. Gregory as traditionally celebrated by the Coptic Orthodox Church), but you can find some videos on YouTube of it being celebrated by Fr. Estephanos Rizk, like
this one. And of course, the Ethiopians are famous for their astoundingly broad Biblical canon, which does not present a problem to their sister churches in the communion which have a much narrower canon (the Copts included).
In terms of practice, it is intensely ascetic and monastically-inclined/influenced. The hours are observed to a great degree (less so by me…

), and we fast for well over half the year, maintaining an essentially vegan diet during this time. It might be interesting for you as an EO to know that this does not include the prohibition on oil. The great fast (al-soum al-kabir), as they call the Lenten Fast, is for 55 days, not the 40 that the westerners do. It includes a preparatory week, which helps account for the difference.
There’s a lot more, but this should get the thread started.