Magento vs Newegg vs Best Buy vs Maingear / Origin PC, when does Magento win?

Honest cut by where you sit in the market:

• Newegg Marketplace, you list as a 3P seller. You get traffic but they take 8-15% commission, control the customer relationship, push their own ABS-branded custom PCs above yours, and own the data. Fine as a launch channel; bad as a long-term home.
• Best Buy / Amazon, same trade. Both will sell you cheaper than your own DTC the second they have inventory leverage. Useful for clearance + brand discovery, deadly as the only channel.
• Maingear / Origin PC / Falcon Northwest / NZXT BLD, these are the players you’re actually competing with for the DTC custom-PC buyer. They all run custom-built configurators (most on bespoke stacks, NZXT BLD on a Shopify Plus hybrid). The configurator depth is the moat.

Magento wins when you want: full configurator control (cross-component compat rules, wattage calc, est. 3DMark score), pre-order queue management for GPU launches (Shopify can’t do anti-scalper logic natively), own data + customer relationship, B2B layer for esports orgs + university programs, multi-region voltage handling. If your moat is configurator UX + launch-day execution + community, Magento is the right home base and Newegg / Best Buy / Amazon are spillover channels.