docs: add overview for each compare page

apps/public/content/compare/umami-alternative.json

@@ -24,6 +24,15 @@
     "founded": 2020,
     "headquarters": "San Francisco Bay Area, USA"
   },
+  "overview": {
+    "title": "Why consider OpenPanel over Umami?",
+    "paragraphs": [
+      "Umami Analytics is a popular open-source web analytics tool known for its clean interface, lightweight script, and privacy-friendly design. It's a great option for developers who want simple, anonymous website metrics. But as your product grows beyond a simple website, Umami's anonymous-only model and lack of product analytics features become limiting.",
+      "OpenPanel builds on the same open-source, privacy-first foundation but adds the product analytics layer that Umami doesn't have. User identification lets you track logged-in users across sessions, while funnels, retention analysis, and cohort breakdowns help you understand how people actually use your product — not just that they visited your site.",
+      "Mobile app analytics is another area where OpenPanel pulls ahead. Umami is web-only with no native mobile SDKs, while OpenPanel offers first-party SDKs for iOS, Android, and React Native. OpenPanel also includes built-in A/B testing for experimentation, which Umami doesn't offer at all.",
+      "Both tools are MIT-licensed and support self-hosting, so you won't sacrifice the open-source values that made Umami appealing. If you need to go beyond anonymous pageview counting and actually understand your users, OpenPanel is the natural upgrade from Umami."
+    ]
+  },
   "summary_comparison": {
     "title": "OpenPanel vs Umami: Which is right for you?",
     "intro": "Both are open-source, privacy-focused analytics tools. Umami focuses on anonymous web analytics. OpenPanel adds user identification and product analytics.",