Why am I getting different results working with SVG files and ImageMagick?
When you are working with SVG files and ImageMagick you can get different results on different machines depending on which additional packages you have installed.
From: http://www.imagemagick.org/script/formats.php Show archive.org snapshot
ImageMagick utilizes inkscape if its in your execution path otherwise RSVG. If neither are available, ImageMagick reverts to its internal SVG renderer.
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