  We argue that the claimed optimality of a new process tomography method
suggested in [quant-ph/0601033] and [quant-ph/0601034] is based on not
completely fair comparison that does not take into account the available
information in an equal way. We also argue that the method is not a new process
tomography scheme, but rather represents an interesting modification of ancilla
assisted process tomography method. In our opinion these modifications require
deeper understanding and further investigation.
