I don't know much myself so I can be wrong but here is my say on this:
2] Dorsal fin of each individual wild splendens can vary in shape and size: some is pointed and other is round.
3] In other wild splendens populations [in pics from Nongkae, Nongjok, Phatumthani, etc.] there are individuals with pointed tail fin too.
4] I'm not sure if "chainam" is anal fin or not but if it is anal fin then lots of wild splendens have pointed anal fin too.
5] Most or all wild splendens [except some such as Srakaow population] have 2 red/gold bars on gill cover. These bars are green/blue in Mahachai and imbellis. One from Srakaow I saw have dark red/black bars that is hard to see except on the edge of gill cover where the color brightens up to red spot.