Originally Posted by Reminosys

Height isn't reliable as an identifying trait unfortunately, a ±2 foot difference from average is common.

Fruit size and fill is also highly variable depending on growth conditions, so it's a detail that is considered but not definitive.

Pisang Raja has U-shaped petiolar canals, whereas Namwa and Blue Java have closed canals. I can't see the canal shape well in any of the photos, so I'll skip that detail for now. Here's a link to some info and photos on Pisang Raja:
https://www.crop-diversity.org/mgis/...on/01BEL084843

The fused knuckles and purple color on freshly emerged pedicels are traits of Namwa.