Answer:
Both Eastern and Western Roman Empire had same culture, official religion, role of the ruler, language, social classes...
Step-by-step explanation:
Western and Eastern Empire were created in 395 CE with the division of the unified empire. That means that Roman Empire lasted for centuries until this moment when it was divided. That is why people in both parts of empire were similar in all mentioned aspects. Of course, when country was divided they continued their roads separately, but certain characteristics weren't changed. For example, Latin language was official language in the Eastern Empire up until 6th Century.