Gravitational time dilation is influenced by gravitational potential rather than just the strength of gravity. To determine time passage differences between planets, one must know both the mass and radius of the planet, not just the gravity value. For instance, while Earth has a gravitational acceleration of 9.8 m/s^2, a black hole with the same gravitational strength can have vastly different time dilation effects due to its mass and size. Therefore, one second on Earth cannot be directly compared to one second on a planet with 3,000 m/s^2 gravity without additional information. Understanding these factors is crucial for assessing how gravity affects time on different celestial bodies.