Not only differences but there are also similarities. Praxis is Latin for practice, and refers to action as per "res non verba' (deeds, not mere words). Freire's concern is reflected in other Marxists' concern, e.g., theology of liberation. In short, they claim preferential and proactive treatment (action and practice for) of the oppressed (e.g. poor or marginalized minority).
Curriculum as praxis, for me, is an obvious argument because curriculum aims at pedagogical (learning and teaching) actions. You do not need to be a Marxist to argue for the importance of putting into action/practice what curriculum outlines.
I have used the above principles in my research article that advocates for different teaching styles for culturally diverse students which I hope you find useful.
Merry Christmas and Happy New Year!
Debra
Article One Style Does Not Fit All: Facilitating Cultural Difference...