I wonder if Eastern and Western Sicilians were exactly the same during the Bronze Age since Eastern Sicily lacked the Bell Beaker culture that Western Sicily had:
The Beaker was introduced in Sicily from Sardinia and spread mainly in the north-west and south-west of the island. In the northwest and in the Palermo kept almost intact its cultural and social characteristics, while in the south-west there was a strong integration with local cultures.[96] The only known single bell-shaped glass in eastern Sicily was found in Syracuse.[96]
The Beaker was introduced in Sicily from Sardinia and spread mainly in the north-west and south-west of the island. In the northwest and in the Palermo kept almost intact its cultural and social characteristics, while in the south-west there was a strong integration with local cultures.[96] The only known single bell-shaped glass in eastern Sicily was found in Syracuse.[96]