Show HN: TransitFeeds.com
transitfeeds.com
transitfeeds.com
One of the core differences though is that TransitFeeds is primarily for browsing and discovering new feeds to interact directly.
The API is more of a value-add so devs can automate their own build processes, or in the case of something like GTFS-RealTime, making the data into a mobile-friendly format (a single GTFS-RealTime snapshot could be say, 2 MB big and contain information for thousands of vehicles).
What a great API to build off of.