The other way of defining the bagua - called the BTB School bagua, or the Western bagua - is defined without taking into consideration the compass direction of the main door.
The truth is, each bagua has its merits, and it will not be correct for me, or anyone else, to say which bagua is better. Both methods reveal intricate ways in which the energy works inside any man-made structure, be it a home or an office, as well as outside, be it your garden or a big city park.
It is up to you to choose a style that feels more appropriate to you, that you feel better about. The Western, or BTB School bagua is easier to apply, and many people achieve results with it.
The Classical, or Compass Feng Shui School bagua requires to first take a compass reading, then define the bagua. It usually takes several attempts to accurately define the classical feng shui bagua.
In your feng shui applications, it is important to choose one bagua style and re-create your home accordingly.
If you are new to feng shui, do not try to apply both baguas at the same time, as this can lead to a lot of confusion, as well as weak results.
Be sure to explore our Feng Shui Bagua Guide that covers tips from dealing with missing areas of the bagua to taking the compass reading.