They must not be the same as these Micro Deans or this article is incorrect since it has 15A.
http://www.flyrc.com/articles/connectors_2.shtml
This other Micro Deans 2 pin show linked to below is listed at 10A.
The same link lists the Ultra as 40+A used on "larger FMA li-poly battery packs."
http://www.hobby-lobby.com/connectors.htm
I have used numerous 2 pin, 4 pin, and Ultras.