Native lead forms, like Meta lead ads, usually win on volume and cost per lead because they remove friction and load instantly on mobile, which matters across the UAE and Saudi Arabia's mobile-heavy audiences. Landing pages usually win on lead quality and downstream conversion because the extra steps filter out low-intent submissions before they hit your CRM.
The practical answer is often both, tested against downstream outcomes rather than CPL: run lead forms for volume and awareness, and a landing page for higher-consideration offers, then compare which source actually converts to sales, not just which is cheaper per lead.