What is the difference between Volkswagen 3Q0 and 5Q0 gateways?

[MacMary]

3-series functions are the same as 5-series, but high-end 3-series aftermarket units require data writing, while 5-series high-end units come with preloaded data and protection removal, making 5-series more expensive but more convenient. Volkswagen Gateway: The gateway serves as the core control device of a vehicle's network system, primarily responsible for coordinating data exchange between networks with different architectures and characteristics, as well as fault diagnosis. Gateway functions: Coordinating information transmission between modules; Prioritization - applying priority dispatching principles based on data importance; Speed adjustment - increasing or decreasing transmission speeds during data exchange.