1. Architecture: Errbot is a Python-based chatbot framework that is highly extensible and allows plugins and backends to be easily added. On the other hand, Hubot is built on Node.js and CoffeeScript and also enables easy integration of new scripts and adapters.

2. Community Support: Errbot has a smaller community compared to Hubot which has a larger and more widespread user base. This can affect the availability of plugins, support, and resources for troubleshooting and development.

3. Customizability: Errbot offers a higher level of customizability with its Python-based framework, allowing for more complex and tailored chatbot solutions. Hubot, while still customizable, may have limitations in terms of flexibility when compared to Errbot.

4. Scripting Language: Errbot uses Python for scripting, which may be advantageous for users familiar with the language or prefer its syntax. Meanwhile, Hubot utilizes CoffeeScript, which may have a steeper learning curve or be less familiar to some users.

5. Ease of Deployment: Hubot is known for its simplicity in deployment, especially within a Docker environment. In contrast, Errbot may require more configuration and setup, potentially making deployment a bit more involved.

6. Maintenance and Updates: Due to their different architectures and community sizes, the frequency of updates, maintenance, and long-term support for Errbot and Hubot may vary. Users should consider these factors when choosing a platform for their chatbot needs.

In Summary, Errbot and Hubot differ in their architecture, community support, customizability, scripting languages, ease of deployment, and maintenance updates.