The CF-105 Arrow and the F4 Phantom 11 were similar aircraft in size, power, speed and vintage.
I am aware that many Canadians saw that the cancellation of the CF105 Arrow was a lost opportunity.
It puzzles me somewhat that after the CF105 Arrow was cancelled, the Canadian Air force id not buy the obvious alternative.
They could have bought a reliable alternative, and have avoided all of the development costs.
The same can be said of the British TSR2. The Australian Air Force bought the F-111 Aardvark when that
was cancelled, and continued to operate the F-111 long after it was withdrawn from U.S. service.