Finger Paints Fun-Fetti v Color Club Wish Upon a Rock-Star v OPI Rainbow Connection v Nicole By OPI Rainbow In The S-Kylie

Lately we have seen so many polishes like these. I just don´t get the point why each nail polish brand  has to have its own. I don´t have all the possible varieties but I have four so I thought it might be helpful if I make a comparison...I know you love them. So I have here Finger Paints Fun-Fetti (F), Color Club Wish Upon A Rock-Star (WUAR), OPI Rainbow Connection (RC) and Nicole By OPI Rainbow In The S-Kylie (RITS).
These are not dupes but they are so close that it is hard to tell a difference. I used one coat over a dark purple creme.