Bucephalandra from Sedong is a bit similar to Bucep. "Padawan". The petiole & stem are reddish coloured! The leaf is elliptic shaped, some leaves are very narrow, dark green - greyish coloured.
Schismatoglottis is competing for space (& sunlight) with Bucephalandra. Even Schismatoglottis is much bigger than Bucep., it failed to propagate as fast as Bucep.