The cathedral takes its name from the word cathedra, or "bishop's throne" and has a specific ecclesiastical role and administrative purpose as the seat of a bishop.
But there is not bishop here, so it can be the next.
The term basilica, when applied to a church, may be used in two ways.
In the ecclesiastical sense, a basilica is a church designated as such by the pope, and that has received certain privileges.
The reason for such a designation is often that the church is a pilgrimage site and contains the relics of a saint, or an object of religious veneration.
Also that is a building that has similarities to the basilica structures of Ancient Rome, being of longitudinal, having a central nave with an aisle on either side separated by a colonnade, and an apse or ambulatory at the end.
As Gothic has:
The south clerestory wall with large windows with Mauméjean stained glasses.
The pointed arches that lends to a suggestion of height.
Ending in some beautiful Spires and pinnacles.
This façade has a large top window with a flamboyant tracery , two bottom side rose windows or an impressive sculptural group as its central feature:
The Portal of the Redemption.