The Earth's rotation creates a centrifugal force that causes water to bulge out at the equator. This bulge is called the equatorial bulge. The Pacific Ocean is located closer to the equator than the Atlantic Ocean, so it experiences a greater centrifugal force. This causes the sea level of the Pacific Ocean to be higher than the sea level of the Atlantic Ocean.
The shape of the ocean basins also affects the height of the sea level. The Pacific Ocean is a much larger ocean than the Atlantic Ocean. This means that the Pacific Ocean has a greater volume of water. The greater volume of water in the Pacific Ocean exerts a greater gravitational pull on the water, which causes the sea level to be higher.
The distribution of land masses also affects the height of the sea level. The Pacific Ocean is surrounded by a number of large land masses, including Asia, North America, and South America. These land masses block the flow of water from the Pacific Ocean into the Atlantic Ocean. This causes the sea level of the Pacific Ocean to be higher than the sea level of the Atlantic Ocean.
In conclusion, the Pacific Ocean and the Atlantic Ocean are not the same height. The difference in height is due to a number of factors, including the Earth's rotation, the shape of the ocean basins, and the distribution of land masses.