It's sure to carry scenes with Spatial or TerrainQuad?

From what I saw to load maps simply using a Spatial = assetManager. loadModel but in jME tutorials is used TerrainQuad that the effect is apparently the same loading Spatial …

Best learn Java before coding games with it. Spatial is the parent class.

I already know Java and already know Spatial is a parent class. My question was what is the difference of the two because we jMonkeyEngine tutorials they use Spatial and TerrainQuad to initialize land

Read the java docs or source you really need the answer.