Post sources please :| I tend be a skepticOther sources say otherwise
I'm not arguing about the abilities, merely how I would like the processes and stages to be similar
Right, I agree with you, but I have to relate it together only cause the Sharingan is derived from it. Plus, Rinnegan could use Susanoo, which means it either can use MS techniques/abilities, or it shares the same abilities as the Sharingan. And if it is either option, that means they are connected.
Just my habit of wanting things to match if they are related similarly. They both are from one original lineage, so that's my preference.