Comment by ericmay

There are a lot of differences. One of the chief differences was that during World War II the United States continental homeland was pretty much untouchable, which allowed the United States and the allies access to a secure and resource rich supply chain that helped lead to victory over the Axis powers.

In an engagement with China it is likely that both sides would be able to strike each other's defense industrial base, with the added "benefit" that American missiles, aircraft, and other equipment are stationed strategically in the region in various countries (Japan, South Korea, Philippines, Australia, and others) and as such the United States can project some amount of destruction on critical Chinese industrial facilities. I'm wondering if China in this scenario would be eager to, or hesitant to strike the United States for fear of a very rapid escalation of the war. Anyway - the point is that long range missiles, drones, and other offensive capabilities mean that supposedly "safe" manufacturing facilities are in danger, with the United States being a bit closer in range to inflict damage than China and with China having I would guess a little bit of hesitancy to strike mainland America.

In addition to some of the simple geographic differences, China has its own strategic challenges. Energy, for one. So far nobody has built a tank, plane, or ship that can run on batteries and while drone technology has continued to advance in many critical ways they don't bring the big bombs quite yet. Naturally the United States in the event of a war is going to at least consider if not outright strike Chinese energy facilities, and deny imports of oil which are critical to supply chains and conducting a war.

If China's only theater is perhaps Taiwan that's probably less of an issue, but then you've got the United States with its, in my view, inferior supply chain, operating unfettered, similar to during World War II while the Chinese supply chain both local and superior particularly for small or "low cost" components is facing both energy stress and stress from missiles or other attacks.

I don't mean to sound pro-USA here or to suggest there aren't other significant advantages or disadvantages for either the United States or China, but to just highlight that your thoughtful comment here which seems to imply that China's massive industrial capacity is akin to the United States' during World War II is not quite an apples-to-apples comparison.