I really don't understand whole KanaMari = NozoEri thing cause it's not. Apart from hair colour there is nothing similar. The only similarity Kanan has to Eri is slightly cool persona.
DiaMari would be far more similar to NozoEri. Mari, as you said would be Nozomi. Boob grabber, loves to fool around, kinda a mother of the group. Initially a loner with no friends. Dia on the other hand is far more similar to Eri than Kanan. Dia is a student council president, just like her. Start as villains to the group but in reality have very caring, loving personalities. Both have younger sisters they care lots about. And while Mari is not assistant, she is a chairwoman so just like NozoEri, DiaMari are together solving school problems. Eri and Dia also have tendencies to sometimes get excited over things like whole Burger scene with Eri. Granted Dia takes it to whole new level and is more expressive.
However, DiaMari still has far more parallels than KanaMari to NozoEri so I really would appreciate people to stop making that claim.
I have nothing against comparing the Sunshine to Muse but at least have a solid base behind it and not just hair colour.
Either way, it's a really nicely drawn picture. Not fan of the two but art is great, love it. Hopefully artist will do more^^