Final answer:
Australians likely have the most contrasting public transportation experience to Spanish consumers, as Australia is known for a strong preference for private car use and less extensive public transportation infrastructure compared to the robust system found in Spain.
Step-by-step explanation:
To identify a group's experience with public transportation that is nearly the opposite of Spanish consumers, we should consider different public transportation systems and cultural behaviors in using them worldwide. As the query does not provide direct data on Spanish consumers' public transportation experience, we will focus on providing general insights. Spanish public transportation is known for being extensive and efficient, especially in cities with services like high-speed trains (AVE) and well-connected metro and bus systems.
Among the options provided, Australians might represent the most contrasting experience. Unlike Spain, where public transportation is widely used, Australia is known for its heavy reliance on private cars, and its cities often lack the same level of public transportation infrastructure and usage. Australian urban sprawl in cities like Sydney and Melbourne, and the preference for cars over public transport, might make Australians' experience with public transportation nearly the opposite of the Spaniards.
While other listed countries like Brazil, Canada, and Hungary have varying degrees of public transport usage, none is as consistently car-oriented as Australia, particularly in its major cities. Therefore, in terms of contrasting public transportation experiences, Australians would likely be the most opposite of Spanish consumers.