Setting
Castello: A fortified historic district on a limestone hill, with medieval gates, walls and elevated streets. Marina: A historic district bounded by Via Roma and shaped by its harbour and warehouse origins.
Both are historic, but the verified geography creates a different relationship with the city.
Arrival from the station
Castello: The final approach is longer and includes the practical consequence of the hilltop setting. Marina: The district reaches Via Roma, making it the shorter station-side option in this comparison.
Choose around luggage and the exact accommodation entrance; neighbourhood labels do not prove step-free access.
Historic character
Castello: The defining features are fortifications, towers, gates and former seats of civic and religious power. Marina: The defining features are the lower historic streets and the district's port-related origins.
The distinction is the kind of historic setting, rather than a claim that one is universally better.
Who should choose each option
Travellers prioritising monuments and an elevated historic setting: Its hilltop fortifications and institutional heritage are the main reason to choose it despite the steeper approach.
Travellers prioritising station access and harbour-side streets: Its boundary along Via Roma and lower-city position make it the more practical arrival base of the two.