PlanetCatfish.com

I appologise if this is an easy one but I am awful at distinguishing between some of these cory species specifically schwartsi, melanistus, delphax, ephippifer.
I think these are melanistus but would like a second opinion

Thanks

Could be...not good at these C. melanistius/brevirostris differences myself...

Thanks for the reply, I am glad its not just me. This group including the brevirostris all look so similar.