TW University's Power Potential (or ACOR) measures the bounce of a ball in a test where the ball is launched at the same speed for all racquets tested. This simulates a situation where every racquet would be swung at the same speed.
So if you can swing racquet Ignite Team, with a higher power potential, as fast as White, with a lower power potential, then racquet Ignite Team will be more powerful - for you. But if Ignite Team has a higher swingweight (which is probably why it has a high power potential) you may not be able to swing it as fast as White, in which case White would likely be more powerful - for you.
So Prince is guessing how fast their customers can swing these racquets and using that guess in defining how powerful they think their frames will be in use.