I would also recommend against having two species of anemones in a tank, but some people do get away with it.
If you are going to do it anyway most folks get one that will settle on the rocks, and one that is a sand dweller. In this way they (HOPE) that the two do not meet and sting each other to death.
If you weren't having any luck with the condy then just take that one back for store credit and get the BTA.
Thomas