Having met both Gilly and Ezra, here are my subjective impressions --
Gilly is more inclined to follow one line of conversation/reasoning for long, while Ezra tends to "derail" them more quickly, or in other words, I guess that I bore Ezra more quickly than I do Gilly.
Paradoxically, or not, Ezra makes more of a "focused" impression than Gilly, that is, Ezra's focus is "jumpy" and the shifts in conversation/attention are more abrupt, while Gilly has a more relaxed attitude, more "fluid".