Difference: Luka gets to have the navel tag while Suigintou doesn't.

conspiracy?

Suigintou, large chested? No way.

some suigintou figures have big breats in the end she is the first and oldest doll from all rozen maiden so thats not really surprised.

some woman in Anime series reminds also on them.
suiginto: kuesu in Talisman himari.
luka: Meer and lacus from gundam seed, catleya from Zero no tsukaima and saori kido/athena from sant seiya.