Whats the difference between a dildo and a vibrator?

Question

Is the only difference that one vibrates?

Answer

Sometimes a vibrator isn’t insertable like a dildo is, it’s just meant to be held on a certain spot but there are some dildos that vibrate too.

Answer

Dildos are for internal stimulation and are designed to be insertable. Some vibrate, many do not.
Vibrators, obviously, vibrate, and many are designed for external use (i.e. clitoral or penile), or internal use (vaginal or anal), or both.

Answer

Vibrators can come in variations that are just used for clitoral stimulation. 
They make dildos that vibrate if that's your thing though 🤷🏼‍♀️ best of both worlds going on.

Answer

Basically