Your icon version looks a bit slimmer (Font and lines of the box) then what I got. I'm not sure why this is, it might be either because you are on Mac OS, or because you used the PostScript export.
Also, not that I took the original output and tweaked it in Inkscape. I did not take the ES -> SVG and use that directly. This also how I created the PdParty logo:
http://danomatika.com/code/pdparty The idea was the keep the Pd proportions as much as possible.
I didn't know about the svg export plugin, I can see if it works on my system.