Need an ID on a fish please

[Cococalm]

Please look at the pic and tell me what fish this is. I have had her about a year as at the time I had 2. But the partner died suddenly. I think it is a Splash Tetra ( Copella Arnoldi ). I have 2 in my tank and I think this one may be a female because the other one has a longer tail and brighter colours. Thinking it is a female ST, I bought a male ST. But they never "hang out" together ..... She is, however, much bigger than the the ST I bought recently.

Thanks for any feedback.

 

[54seaweed]

Looks like a splashing tetra follow link for comparison
Splashing Tetra