If it comes down to European vs Russian manufacturing capacity for missiles and hi-tech weaponry, etc, I'd put my money on Europe. Europe also has the advantage of seeing 5 years of Russia throwing their best at Ukraine, having their air defenses repeatedly breached by Ukraine, even deep into Russia using slow low-tech drones - they know many of Russia's weaknesses.

Yes. The US defense industry depends on European one. Take a look at F35 and where the components are made.

Ah yes, the only country that matters /s