DARK ACHILLES is bigger and the leaves are blue or deep blue. Young leaves are reddish.
Achilles flowers are white, but there are also reported varietes with pink flowers. Achilles stems grow vertically so multiplication is done through separation young seedlings appear on thick stems. It is not a creeping specimen like Gaia, Silver Powder or Aegis.
TIPS: I have observed that in the case of a larger amount of iron in water, Achilles gets pink pigment, and it is also visible in the back side of the leaf.