The difference between ethics and morals

Ethics deals with right right versus wrong and is philosophical, morals deals with good versus evil and is theological. Zoroastrianism is ethical and Christianity is moralistic. Zoroastrianism does not believe in sin, it merely believes in right and wrong thoughts, words and deeds, while Christianity is built on the notion of sin and how to deal with sin (Christ has to die on a cross to cleanse the world from sin). This division has been established by Baruch Spinoza in the world of philosophy (and theology) and has after Spinoza been endorsed by thinkers such as Nietzsche, Heidegger, Lacan, Deleuze och in our time especially Jurgen Habermas, who are all ethicists.