Antonyms for the phrase "be same class as" include "be different class from" and "be inferior/superior class to." These alternatives suggest a distinction in social status or hierarchy, indicating that one individual or group may be seen as more or less important than another. Other antonyms might include "be in opposition to" or "be unrelated to," depending on the context in which the phrase is being used. These distinctions can be important in social, political, or economic contexts where status and hierarchy play a significant role. By using antonyms to "be same class as," we can express the nuances of social dynamics and power relationships in a more precise manner.