1. Integration with Platform-specific Technologies: Bolts is a generic library that can be used across different platforms, while Cocoa Touch is specifically designed for iOS development, allowing for seamless integration with Apple's proprietary technologies such as UIKit, Core Animation, and Core Data.
2. Threading Model: Bolts provides a more simplified threading model with tasks and continuations, whereas Cocoa Touch utilizes Grand Central Dispatch (GCD) and Operation Queue for managing concurrency and parallelism in iOS applications.
3. Error Handling: Bolts includes built-in error handling mechanisms such as Task.fail() for propagating errors, while Cocoa Touch relies on traditional error-handling approaches like try-catch blocks and NSError objects.
4. Community Support and Documentation: Cocoa Touch benefits from a larger and more established developer community, resulting in extensive documentation, tutorials, and third-party libraries specifically tailored for iOS development, whereas Bolts may have a smaller community and limited resources available.
5. Performance Optimization: Cocoa Touch, being tightly integrated with the iOS ecosystem, can leverage platform-specific optimizations for maximum performance, whereas Bolts may not fully utilize platform-specific performance enhancements.
6. Compatibility and Updates: Cocoa Touch is consistently updated and aligned with the latest iOS version releases, ensuring compatibility with new features and technologies introduced by Apple, whereas Bolts may lag in updates and compatibility with the latest iOS advancements.

In Summary, Bolts and Cocoa Touch differ in their platform-specific integration, threading models, error handling, community support, performance optimization, and compatibility with the latest iOS updates.