An honest, cited answer. We make no ROI, salary, placement, or 'worth it' claim, and we don't track live job demand — where we don't know, we say so.
We have no employer-preference evidence, and we won't invent it — so this page describes how the two kinds differ in who sets the exam and what it covers, which our sources do show, rather than how employers weigh them, which they don't. Vendor-neutral certs (CompTIA A+, Network+, Security+) are published by a body that sells no platform, and their objectives cover cross-platform fundamentals. Vendor-specific certs (AWS, Microsoft, Cisco) are published by the platform vendor, and their objectives cover that vendor's own products and tooling. Which of those a given employer values is role- and employer-specific and we cannot source it. We won't quote a 'percentage of managers who prefer X' figure — we found no authoritative primary source for that, so we won't repeat it. Check the postings for your target role to see which the employers you care about actually ask for.
What we don't know
We don't publish an employer-preference percentage — no authoritative primary source. Preference is role- and employer-specific.