I have both at home, to be honest, I have 4 different Camelia oils, I tried all of them and compared them.
C.oleifera is in my opinion a tiny bit heavier than C. Japonica, but when it comes to their moisturizing properties, there is not a huge noticable difference. I have hair similar to yours, so it should be similar on your hair.
C.oleifera added more shine to my hair so, but was more difficult to not overdose.
So in a nutshell, they are both great and I will rebuy both of them.