Apistogramma sp "steel blue" vs Apistogramma sp Ma

[dom]

bought 4 pieces of this fella.
http://www.aaf.or.kr/apis/gallery4/...e/steelblue.htm

some how, i found in Aquazoo. They said it is Apistogramma sp Marken. They look almost 99% the same.

any expert in here can differentiate them?

[Heartbreaker714]

Where did you get the Apistogramma sp. steel blue? I know not a lot of people dont like this fish but I love the colors