I think part of the conflicting information may be that the websites don't clarify if the length is standard length (SL) or total length. The former is without the tail (from snout to base), while the latter can include the tail.
According to planet catfish, a Mango SL is 11", almost the same size as the common.
http://www.planetcatfish.com/catelog/species.php?species_id=191
According to planet catfish, a Mango SL is 11", almost the same size as the common.
http://www.planetcatfish.com/catelog/species.php?species_id=191

