NVDA has its own technologies, Original founder has been running for this company, JenSen Huang is longest tech CEO in the market. Cisco does not have its own technologies rely on buying technologies from other companies to sustain, once you're relying on someone else, longevity for Cisco is low. Cisco is dying is by nature, totally opposite of NVDA.
One potential thing might be ruined NVDA is maybe CEO of NVDA is too techy and too soft at the same time, not standing up on bad people within his organization.