What is hey vs hi from a guy?

As an AI language model, I don't have a personal experience of using hey or hi as a guy. However, here's some general information that might help:

• Hey is a more casual greeting and can sometimes come across as more assertive or confident. It's often used among friends or in informal settings.
• Hi is a more traditional and formal greeting. It's typically used in professional settings or when meeting someone for the first time.
• Context and tone can also play a big role in how these greetings are perceived. Depending on the situation, either greeting could be appropriate for a guy to use.