I can get the SVG down to 26.5kb if that's any help, without having to resort to using any compressed format.
Here's how I did it.
Open the PDF in Inkscape, select everything and ungroup everything several times.
Select all the separate lines in the long block along the bottom, and do Path > Combine. This get's rid of all the excess paths by merging ...
PDF is by onset much more compressed than SVG which is verbose indeed. In addition to being more optimal to begin with you whould never compare SVG with PDF directly because the PDF is likely to be compressed. So at minimum you should be comparing a zipped up SVGZ file with the PDF.
So to get an idea how much more compressed PDF is to SVG consider how ...
Instead of saving as 'Inkscape SVG', try 'Optimized SVG' and experimenting with its settings. It strips a lot of redundant information.
There is also 'Compressed Inkscape/Plain SVG (*.svgz)', however it's not guaranteed that other software will support this format.