svg image is indexed by Google, as it is a separate file
It can be re-sized easily, by just changing the image dimensions, like this (I used width="500" height="300"):
While the svg's internal style is applied, it cannot "find" @font-face Web fonts (note the axis lables are not in the correct font)
It's an extra server call for each <img> tag. Bandwidth will be almost identical, but it takes the server time to find the file, then deliver it to the browser
Any overlaid html (like text elements that cannot be realised with SVG's internal <text> element) will not be included with the SVG file, hence not indexed.
The svg source is indexed by Google
The internal style sheet is recognised and applied, including @font-family Web fonts
Can scale the SVG file. For example, the following object has width="500" height="300" (and then a smaller one following). For this to work, you need to set the viewport as follows: preserveAspectRatio="xMinYMin meet" viewBox="0 0 310 200".
Need to explicitly add the @font-family URLs to the SVG style sheet (does not get this from the parent HTML style sheet)