How so? In terms of penetration capability (Speed/Range/Load, for Nuke Strike) and the systems on board (The only major difference being Doppler Nav on the F-105, and an INS in the F-104G/CF-104 , there wasn't a whole lot to choose from. The 105 was bigger, more expensive, had a better conventional capability, a pretty air air-air capability, and could be mid-air refueled. But the Canadians didn't go for any of that - No tankers, no conventional or air-air capability whatsoever (Not even a gunsight). Would the Thud, or even a normal F-104G have been better? Most likely, but that's not what Ottawa wanted to buy.