Answer:
Similitudes:
Both caves have paintings of animals.
Both use different colors to paint the animals.
Differences:
The bison is the primary animal painted in the Altamira caves. While in Lascaux the paintings show: bison, deer, horses, and cattle – all running across the walls.
In Altamira caves there are at least 16 bison grouped in the center of the cave with 2 boars and 1 deer. In Lascaux the animals are dispersed in various places of the cave.