Which ACT Scores to Submit?

My son’s September 2016 ACT test score just came out. His composite score went down from 33 (from April 2016 score) to 32 BUT with better and improved scores on Writing (from 08, 08, 08, 08 in April to 09, 08, 09, 09 in Sept.). The superscore from these two tests yielded 33, the same as the April score, so no improvement there.

The question I have is, should my son submit both these tests for superscored reporting or should he just report the April composite score of 33?

Submit the 33. Both writing scores are very good, and most schools will judge his writing by his common app and supplemental essays anyway