Yes Concordia K2 Basecamp trek is also known as  k2 Concordia trek Pakistan. because Concordia camp is the Centre of the amphitheater of peaks at the upper Baltoro glacier.
Concordia is the viewpoint of k2, Broad Peak, and other peaks in the surroundings, and most trekkers do not go to base camp and stay at Concordia camp that is why it was named as k2 Concordia trek pakistan.
k2 peak is more visible from Concordia camp than from k2 BC.