Between two bands This Century and Residual Kid, which band has been more active recently?
Residual Kid: Residual Kid is an American rock band from Austin, Texas formed in 2009. Residual Kid:  They have released three EPs: "Box" in 2011, which was recorded with an earlier lineup, "Faces", featuring the current lineup, in 2012, and "Salsa" in 2016.
i don't know