According to Hsu, Ching, and Grabowski (2014), “unlike group blogs where individuals contribute to their own section of writing, wikis enable users to edit each other’s work on the same page, to track revision history made by users, and to “roll back” to previous versions through a page history feature (p.751).”
Hsu, Y.C., Ching, Y.H., & Grabowski, B.L. (2014). Web 2.0 Applications and practices for learning through collaboration. In Spector, J. M., Merrill, M. D., Elen, J., & Bishop, M. J. Handbook of research on educational communications and technology (4th ed.)(747-758). New York, NY: Springer.