docs(xsschema): update

docs/content/docs/packages-top/xsschema.mdx

@@ -15,7 +15,26 @@ npm i xsschema
 
 - Actively maintained along with xsAI.
 - Support for up to libraries in the Standard Schema scope.
-- Already used by xsAI, [xsMCP](https://github.com/moeru-ai/xsmcp), [FastMCP](https://github.com/punkpeye/fastmcp), [Airi](https://github.com/moeru-ai/airi) and others.
+- Already used by xsAI (you are here), [FastMCP](https://github.com/punkpeye/fastmcp), [Airi](https://github.com/moeru-ai/airi) and others.
+
+### Compare
+
+#### `xsschema` (0.4.0-beta.3, 17KB)
+
+- Minimum size, ESM only.
+- Detailed error message with links.
+- Additional types and utils. (see below)
+
+#### `@standard-community/standard-json` (0.3.1, 96KB)
+
+- Similar to xsSchema, but larger in size.
+- Supports CommonJS.
+
+#### `@typeschema/main` (0.14.1, 68KB)
+
+- Lack of maintenance, with supporting libraries remaining on outdated versions.
+- Support for the most schema validators.
+- Not based on the Standard Schema.
 
 ## Coverage