Final answer:
Subjective relativism and ethical egoism both acknowledge subjectivity in moral judgements, but they diverge in that subjective relativism focuses on individual or cultural beliefs, while ethical egoism promotes self-interest as a universal moral standard.
Step-by-step explanation:
Subjective relativism and ethical egoism are two philosophical positions that describe attitudes toward morality and ethics. A key similarity between subjective relativism and ethical egoism is that both theories suggest that there is some level of subjectivity in how people determine what is ethical. However, they differ in focus: subjective relativism claims that morals are relative to an individual's or society's beliefs, whereas ethical egoism suggests that actions are morally right if they promote the individual's self-interest.
A notable difference between the two is that subjective relativism emphasizes cultural and individual perspectives, meaning that what is considered right or wrong varies from culture to culture or person to person. Ethical egoism, by contrast, universally endorses self-interest as the criterion for moral action across all cultures and individuals, implying consistent self-interest driven behavior irrespective of cultural norms.