Can the poor performance of createOutline() be increased?

I wrote a little Script converting an Array of Strings to outlines for SVG export. I however find the results of createOutline() extremely unsatisfactory, especially when compared to the results of doing the job "manually" (Right click > create outlines).

Right click, "Create Outlines"

createOutline() from Script

From first sight this seems like an issue with conversion accuracy set too low, however I wasn't able to locate a parameter to change the same.

Any help on how to achieve the look of the top image from within a script is highly appreciated.