The gap comes down to portfolio concentration versus diversification. Carnegie went all-in on steel—a single, visible product that Americans could touch and see in their cities' skylines. By 1901, he controlled 30% of U.S. steel production, creating a monopoly narrative that made him famous and legendarily wealthy. Westinghouse, meanwhile, fragmented his empire across air brakes, electrical systems, turbines, and transmission infrastructure. His wealth was real ($3.8B equivalent), but it was distributed across invisible systems running *behind* America's walls and under its rails. You see a Carnegie building; you don't see Westinghouse's current flowing through it.

Business timing and exit strategy separated them further. Carnegie sold his steel company to J.P. Morgan in 1901 for $480 million (a staggering sum that crystallized his fortune instantly), then spent his final decades as a philanthropist—cementing his legend with libraries and institutions bearing his name. Westinghouse never had that singular exit event. He built and rebuilt his company through the 1900s-1910s, weathering recessions and the Edison rivalry, accumulating wealth more gradually. By the time his fortune peaked in 1914 at $60 million, the public's attention had already shifted. His wealth was abstract: held in patents, infrastructure contracts, and equity stakes rather than a singular, dramatic acquisition.

The final factor is narrative control and legacy infrastructure. Carnegie consciously built monuments—libraries, universities, peace initiatives—that made his name synonymous with American progress. Westinghouse's legacy is embedded in the *systems* themselves: your home's electrical current, the brakes stopping trains, the turbines powering cities. That invisibility compounds over decades; Westinghouse's wealth became a historical footnote while Carnegie became American royalty. In modern terms, it's the difference between Elon Musk (visible, branded, founder-centric) and the components suppliers funding the entire EV ecosystem (richer, quieter, forgotten).