Both embeddings of TinyMCE use the same TinyMCE codebase, but are configured separately. You can tweak the TinyMCE configuration for Static Pages in plugins/generic/staticPages/StaticPagesEditForm.inc.php.
We’ve already rewritten this for OJS 3.0, so we’re not likely to make any major changes to the 2.x Static Pages plugin.
Regards,
Alec Smecher
Public Knowledge Project Team