Original Black Canary on this page, last on the bottom row.
Original Psylocke here.
Here, watch me rationalize. Copying a picture is not terribly hard (although it's not always easy, either). All the really difficult bits have been done for you. The excuse for copying is to let the process draw your attention to the details. By trying to reproduce the results of a better (or even just different) artist, you can learn something about how they solve the problems a picture presents. I was startled to realize, for example, how stylized Joshua Middleton's picture was, when the initial impression is one of extreme realism, at least in comparison to other comic artists.