First, both wars were initiated through the efforts of some nations to alter the global order. Plus, the efforts of other nations toward preventing that. For instance, Germany desired more power for itself in both wars, and other nations tried to prevent that.
Second, both wars were complete conflicts that were won by the side that could produce the most and best weaponries.
Finally, both were wars that ended with triumphs for the nations that had ruled the world order beforehand. In plain English, the rebellious nations lost in