Inkscape

Different renderers may differ by how they implement the process described in the filter being used. You may not get the exact same look through a browser as with inkscape, and the rendering may take too much resources for an svg to load.
Unfortunately, pdf format doesn't support filtering, so if you want to share or print your images, rasterizing the filtered objects is the only way for preserving the appearance.

Besides these, due to the procedural nature, rendering the image can be done at any resolution.
That means you are not bounded to a certain image size unlike with a raster image editor.
Everything is (supposed to be) rendered live, on the fly.
This advantage has its price on the rendering time and resources used. Using complex filtering can result in a crawling machine.