No. As both are fictional creations, neither is any more powerful than the other.
First, it is rifle, not riffle. Second, no, or we would shoot tanks with a rifle. Cannon are more powerful. Finally, depends on the rifle. I have a .22 rifle and a .44 magnum pistol. The pistol is far more powerful than the rifle. I also have a .22 pistol, and a 30-06 rifle. The rifle is far more powerful than the pistol (in THAT example).
30-06 is much more powerful.
270
Yes. Pump, Spring and PCP (PreCharged Pneumatic) are all more powerful than a C02 system
Minerva McGonagall is more powerful than Amelia bones
Yes
No
If you mean .17 HMR and .22 LR, yes.
there are 2 wicked witches, The wicked witch of the west, Theodora and the wicked witch of the east, Evanora. Theodora is the more powerful one with the green face and Evanora is the one that has been a witch longer than Theodora.
The .243. It's basically a necked down .308 Winchester.
Whether or not an air rifle is more powerful than a cross bow depends on the air rifle or cross bow. Generally a hunter's cross bow is more powerful than a child's bb gun. However, during the Napoleonic Wars, the Austrians had an extremely powerful repeating air rifle. It could shoot several hundred meters. Austrian solders armed with them could shoot Napoleon's solders from such a great distance that Napoleon's solders could do nothing about it. Eventually they ran out of bullets.