1. Memory Management: In Ada, memory management is done manually by the programmer through explicit allocation and deallocation of memory. Whereas, in Go, memory management is automated through a garbage collector.
2. Concurrency Model: Ada utilizes a traditional multi-threaded model for concurrency, with tasks and protected types for synchronization. On the other hand, Go uses goroutines and channels to achieve concurrency, making it simpler and more efficient for certain types of programming tasks.
3. Type System: Ada has a strong static type system that requires explicit type declarations and strict type checking. In contrast, Go has a more flexible type system with type interface and type inference capabilities, allowing for more concise code.
4. Error Handling: Ada relies heavily on exceptions for error handling, using exception propagation mechanisms. In Go, error handling is done through return values, where functions return an error value that needs to be checked by the caller.
5. Tooling Support: Ada has a more mature tooling ecosystem with robust static analysis tools, debuggers, and profilers. Go, on the other hand, has a user-friendly toolchain with built-in support for testing, profiling, and benchmarking.
6. Package Management: Ada lacks a built-in package management system, making it challenging to handle dependencies. In contrast, Go has a straightforward package management system using the "go get" command, making it easy to manage dependencies.

In Summary, Ada and Go differ in memory management, concurrency model, type system, error handling, tooling support, and package management.