The Mediterranean islands of Corsica and Sardinia have many perceptual and actual similarities. They both have similar climates, however Corsica is a part of France and speaks French, while Sardinia is Italian. Corsica is more mountainous, but has fewer beaches. Although these islands share many characteristics, they are also quite distinct. 

Corsica and Sardinia were one Roman province. Sardinia provided much of the grain for the Roman Republic, an example of the islands fertile soil and climate. Due to the fact that the islands sit at a crossroads in the middle of the Mediterranean, they both have been liable to colonizers and traders. Considering their strategic location, Corsica and Sardinia have been important places for the powers that held them. Corsicas inhabitants date back to 3,000 BC, noted for their standing stone monuments which can still be seen today. Sardinia and Corsica share archaeological history, serving the heritage industry and tourism. 

"Corsica, Island and Territorial Collectivity, France." Brittanica. https://www.britannica.com/place/Corsica

"Sardinia, Island, Italy." Encyclopedia Brittanica. https://www.britannica.com/place/Sardinia-island-Italy

"Corsica and Sardinia: Twice as Nice." March 3 2011. Travel Weekly. http://www.travelweekly.co.uk/articles/36321/corsica-and-sardinia-twice-as-nice