What is the difference between the territories of Ancient Italy and Ancient Greece.

Differences:

Greece did not have its own gold deposits; it was brought from the north from Thrace or Macedonia.
Large deposits of clay, stone and copper (especially on the island of Evia).

The territory was fragmented into insular (Crete, Rhodes, Ithaca, Euboea, Lesvos) and continental (Athens, Sparta, Thebes, Olympia). Problems with fresh water, especially in Athens, dependence on grain imports (from the Scythians and from Egypt), little fertile land for cereals, but a lot for olives and grapes. Good conditions for sheep breeding.

Italy is a continental territory, the islands (Sardinia, Elba, Sicily) did not play a significant role in the formation of the Roman civilization. The climate is not as harsh as in Greece, the Alps mountains protect from cold winds from the north, more fertile land and better supply of fresh water (rivers Tiber, Padua). Rome was not a port city. The presence of swamps (Malevent, Pomptinsky swamps). The soils are chernozems in Apulia and red soils in Etruria.
Good conditions for breeding cattle. There are many minerals: tin, iron, shale, silver, salt.