The personal statement is about your personal history, including your personal experience and your thought on what makes you apply to this job. The academic statement is your academic history, summarizing your interest and where and what you have learned at colleges and universities. The format could be different from the countries where you are. There should be sample statements on the internet.

I concur with Shin Murakami. One is about your personal philosophy and the other is your academic accomplishments and philosophy.