[member="Kairn Vol"] I have 2 characters on standby for taking apprentices, and what you'll get out of them is nearly identical (aside from Djem-so vs. Makashi, but you'll only get a nominal skill level from them). However, faction considerations are still in play.
You think the Alliance is a better fit? Go with Cathul.
On the other hand, you think the [Third] Confederacy of Independent Systems (different from the canon one, referred to as the First Confederacy) is a better fit? Go with Jessica.