Add that check to the not-equals helper and update the json value implementation to mark all non-scalars as not-equals.

src/bin.rs

@@ -145,7 +145,15 @@ impl CompareContextElement for serde_json::Value {
         // Handle other serde_json::Value
         match other.to_any().downcast_ref::<Self>() {
             None => (),
-            Some(other_json_value) => return self == other_json_value,
+            Some(other_json_value) => match (self, other_json_value) {
+                // Non-scalar values not caught in the renderer by the
+                // identical-path shortcut are always not equal.
+                (serde_json::Value::Array(_), _)
+                | (_, serde_json::Value::Array(_))
+                | (serde_json::Value::Object(_), _)
+                | (_, serde_json::Value::Object(_)) => return false,
+                _ => return self == other_json_value,
+            },
         }
         // Handle string literals
         match other.to_any().downcast_ref::<String>() {