Sort of self-explanatory. Basically Rose Quartz's (one with colors) hair follows the exact outline of Lion's mane. The one below (Rose Diamond in "We need to talk") doesn't. This helps my theory of arose Quartz being a fusion.

Serious note! If you don't agree with a theory, please keep it to yourself. I'm so tired of reading "Nope, don't believe it." Or "Sorry but no." Or the worst one, "This is so bad, I just can't." I put a lot of time into these and for someone to sit there and try, keyword try, to be funny by slandering them really annoys me.