I think Julian and Garak would both like Frank Miller’s Dark Knight comics. I think (at least in the beginning) Julian would romanticize Batman, considering him a heroic man who works in the shadows in order to achieve what no one else seems to be able to (sound familiar…?).
But as many have pointed out, Miller’s Batman is fascist, using violence to enforce his own sense of law and order. I think Garak would point this out to Julian, and he would perhaps reevaluate his assessment of Batman, knowing that it does not mesh well with his Federation idealism. I do think Garak would consider Batman’s methods an effective, if crude, means of achieving order. I honestly would love to see what kind of debates this topic would spark! And they could also get into the various incarnations of Batman, such as Gotham (which, IMO, has some highly intriguing villains worth examining).