There are several distinct differences between the two; The way the bars are tuned, the marimba reads the written pitch as the xylophone is one octave higher, xylophone bars are thicker and marimba bars are made of a softer wood. Marimbas are also larger in size and have a deeper darker sound.
Two scholars, Marcus and Jones, believed that the xylophone migrated to Africa during the fourteenth century. Xylophones are not found throughout Africa. In fact, they are not found in Northern Africa. Though the marimba can comparatively be described as a low pitched xylophone, the argument is that culturally the backgrounds of these two instruments are different.
Some evidence supports that the xylophone originated in the thirteenth century in what is today known as Mali. In fact, of the word marimba has its origin of the word mbila, a Congo basin region language. As this pitch percussion instrument was adopted in Latin America they used calabashes as resonators which was similarly used throughout the Congo and Tanzania in Central Africa. The Africans made calabashes from dried gourds of the calabash