1. Integration with Other Tools: ProtoPie has the advantage of seamless integration with other design tools like Sketch and Figma, allowing designers to easily import their designs and assets into ProtoPie. On the other hand, UXPin lacks this level of integration and requires designers to manually recreate their designs within the tool.
2. Advanced Interaction Design Capabilities: ProtoPie offers more advanced interaction design capabilities compared to UXPin. It allows designers to create complex interaction flows using conditional statements, variables, and sensors, enabling them to create highly interactive and dynamic prototypes. UXPin, although having interaction design features, does not offer the same level of complexity and flexibility.
3. Compatibility with Multiple Platforms: When it comes to platform compatibility, ProtoPie excels by offering support for a wide range of platforms such as iOS, Android, macOS, Windows, and web browsers. This allows designers to test their prototypes on multiple devices easily. In contrast, UXPin primarily focuses on web-based prototyping and lacks extensive support for other platforms.
4. Real-Time Collaboration: ProtoPie offers real-time collaboration capabilities, allowing multiple designers to work on a prototype simultaneously. This feature enhances team collaboration and streamlines the design process. In contrast, UXPin has limited collaboration features and mostly relies on the traditional file-sharing method for collaboration.
5. Device Sensor Interactions: ProtoPie allows designers to create interaction prototypes that utilize device sensors like gyroscope, accelerometer, and compass. This enables designers to create more realistic and immersive prototypes that respond to real-world movements and gestures. UXPin lacks this capability and restricts designers to more traditional interaction design methods.
6. Learning Curve: UXPin has a steep learning curve compared to ProtoPie. ProtoPie provides a more intuitive and user-friendly interface that is easier to learn and navigate, making it more accessible to designers with varying levels of expertise.

In Summary, ProtoPie has a distinct advantage in terms of integration with other tools, advanced interaction design capabilities, compatibility with multiple platforms, real-time collaboration, device sensor interactions, and a more user-friendly learning curve compared to UXPin.