Hardware-wise the Pro shares the H2D platform: same volume, speed, temperatures, chamber. The differences are enterprise-shaped: a tungsten-carbide nozzle for abrasive filaments as standard, and the sales/support wrapper businesses need (procurement, fleet management, service terms).
For an individual, every Pro hardware benefit can be added to a standard H2D for a fraction of $2,250, and hardened nozzles are exactly such an add-on. The Pro exists so companies can buy Bambu without friction, not to out-print the H2D on a desk.