It looks like the action.abort.type field is not populated for Wikitext. Having this field will be critical for comparing usage patterns of Wikitext to VE.
> SELECT DISTINCT event_editor, `event_action.abort.type` FROM Edit_11448630 WHERE timestamp BETWEEN "20150401" AND "20150402"; +--------------+-------------------------+ | event_editor | event_action.abort.type | +--------------+-------------------------+ | wikitext | NULL | | visualeditor | nochange | | visualeditor | abandon | | visualeditor | NULL | | visualeditor | switchwithout | | visualeditor | preinit | | visualeditor | switchwith | | visualeditor | abandonMidsave | +--------------+-------------------------+ 8 rows in set (1 min 1.64 sec)