C lopis Vs Spotless clownknife

[Peckoltia]

G'day

I have a knife fish with no spots. Got it at about 5" and is currently 24" about 18months later. So growth has been steady but not out of this world. Some people/sources have told me that it is a spotless clown knife other a C lopis. Is there anyway of telling the difference? any thoughts would be appreciated?

Here are some pics at varying sizes -

 

[benzjamin13]

I've heard of a Spotless Chitala Chitala, but I do think that they are Chitala Lopis. Unless someone can provide side by side pictures, It'll be really hard to tell. Therefore, I say C. Lopis.

 

[Andri Pogo]

thats a pretty good growth rate. i got mine around the same time as you and he is 'only' 14".
I say its a Lopis

 

[Miguel]

Lopis for me. Eyes are different than CK. So is the muzzle.