The lack of multipage support is the most obvious distinction, I think, but you could probably add the necessary metadata and render fake borders and boxes to simulate pages if you really wanted to. As far as I know, SVGs cannot contain forms for one example. PDFs can also be digitally signed according to the spec, and they contain DRM provisions.
PDF has a lot of features that I would never think of myself (pronunciation guides, for example) which would require designing a custom solution for in many other formats such as SVG.
If I wanted to render something to be printed and I wanted it to be printed exactly as specified, I would consider PDF (and PostScript) files to be much more reliable than SVG files. SVGs are great for images and icons, but they're simply not designed to do the things PDF was designed to do.
Conversely, PDFs are difficult to embed and require proprietary tools to use most of their less common features, so in many areas they're much worse than SVGs.
PDF has a lot of features that I would never think of myself (pronunciation guides, for example) which would require designing a custom solution for in many other formats such as SVG.
If I wanted to render something to be printed and I wanted it to be printed exactly as specified, I would consider PDF (and PostScript) files to be much more reliable than SVG files. SVGs are great for images and icons, but they're simply not designed to do the things PDF was designed to do.
Conversely, PDFs are difficult to embed and require proprietary tools to use most of their less common features, so in many areas they're much worse than SVGs.