What Netlify does better
Netlify is a developer platform, and Drop is just its quickest entrance. According to Netlify's docs, if you are logged in you can drop a project that still needs a build step and Netlify detects the framework and builds it for you. Around that sit serverless functions, forms, deploy previews, Git-based deploys, team features and a CLI. The free plan already includes custom domains with SSL. Link in Seconds has no build step, no functions and no forms. If your site needs any server-side logic, Netlify is the better home.