What is the difference between a New Haven 410 283 tb and 283 b?

The New Haven 410 283 TB and 283 B refer to different types of train cars in the New Haven Railroad fleet. The "TB" typically indicates a trailer car, which is non-powered and designed to carry passengers or freight, while the "B" designates a powered car that contains engines and is capable of propulsion. These distinctions affect their roles in train operations and their design features.