I am goin gto be completley honest, and these fish do not look IBC show quality to me. I do not participate in shows, nor do I hav emuch experience with them. But from what i have learnt in the past, they have a long way to go.
For Ren his pattern colours are really mixed up and kinda everywhere, they should be split up more definitively, his caudal is rounded too much from what i can see, as well as the dorsal rays are too short in the front, and it looks like he may have a spoon head.
For Kamui he has split ventrals (bad), first 2-3 dorsal rays are too short, caudal is rounded and the anal fin should come to a definite point not split up rays.And his purple blue red butterfly patter is made up of red and blue washes and the butterfly pattern should be more defined.
This is just from what i have learnt. I may be completley wrong as i am not a judge at all. I would wait to see what others have to say as well.