When comparing Duality vs Stride, the Slant community recommends Duality for most people. In the question“What are the best 2D C# game engines?” Duality is ranked 5th while Stride is ranked 6th. The most important reason people chose Duality is:
The full source code is available on GitHub, where the framework is actively developed. All of the editor, core and plugin code is written in C#.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Open source
The full source code is available on GitHub, where the framework is actively developed. All of the editor, core and plugin code is written in C#.

Pro Great editor
Duality includes a powerful visual editing system that can be used for previewing, integrating, editing and testing game content.

Pro Live reload of code and assets

Pro Very extensible
Because both Core and Editor are completely plugin-based, Duality not only incorporates a clean and modular design, but is also very extensible - even if it wasn't Open Source. In fact, most of the standard editing capabilities comes in form of Editor plugins.

Pro Built-in physics and lighting

Pro Friendly to version control systems
It can be configured to serialize all data in a text-based format, which has been structurally optimized for version control systems.

Pro Used in commercial projects
It has been used in a production environment without burning the place to the ground. Supposedly artist-proof editor workflow with an API for tailoring the system to fit your team.

Pro Good looking and fast
Looking nearly as good as Unreal Engine 4, but rendering significantly faster.
Pro No royalties or licensing fees
Pro Projects are normal Visual Studio solutions
No proprietary project format, so it works with all the official .NET tooling.
Pro Supports Visual Studio
Pro Very modern render engine
Pro Powerful 3D Rendering Engine
Supports Vulkan. You can achieve good quality as in Unity3d and Unreal Engine

Pro Straightforward editor
Stride provides a simple and clean working environment for designing games.
Pro Community seems friendly and is growing
Pro Engine AND Scripting are both C#
Since the engine is written in the same language as the scripting, there is no weird mix of technologies as other engines have.
Pro Supports Vulkan
Currently the only well known open-source game engine that supports Vulkan, and probably one of the only.
Pro Easy to learn and use C#
Pro Multiple Starter Templates
The engine comes packed with multiole example projects to help you get started.
Cons
Con Visual Studio required
To have possibility for scripting you have to download entire Visual Studio and spend 10 GB of free space
Con Requires windows for development
Con No terrain editor
Unless you like working on planes, there is no terrain support.
Con Editor is Windows only
Since version 1.7, Linux can be targeted for runtime. The editor for the engine is available only to Windows though.
Con Small user community
Unity and UE have a vast amount of user community.
Con Does not currently support Playstation or Switch games
Con Iteration may be slower than with other engines due to longer "build" times when certain changes are made
Con Shader system require's overhaul
Shader's are not easy to get to grips with and Stride's shader system. Needs overhauling for easier use.
