(This is really just me making a handy rewatch guide)
1x04 4 (Ben, Lila, Kristen, Kristen)
1x08 1 (Lila)
1x09 1 (Andy)
1x12 1 (Lila, Lila is the one who hugs him and drags him over by the hand)
1x13 1 (Laura)
2x04 1 (Laura)
3x03 2 (Lila, twice)
(Laura is the one who talks to Ben in 3x10)
4x02 1 (Laura)
4x11 2 (Lila, Ellie pretending to be Laura)
4x14 1 (All four Ls)
14 total utterances of "Ben the Magnificent", plus Lila's "you're not very magnificent lately" makes 15. 8 of them (over half) are from season 1. Lila racks up 6 of them (a little less than half), and Laura 3 (around 20%).
So, it turns out that Ben's relationship with the girls isn't fully equal. Lila and Laura have a particular affinity for him.
I wonder if there's a connection to my impression that Lila and Laura are the ones who tend to drive the nonstop chatter during the overlapping talking moments, whereas Lynn and Lexis tend to have more beats and non-spoken reactions (i.e. facial expressions) in their contributions to the flow. Of course, there's an element of actor improv tendency to those cases.
But, it does bear out in the scripted lines that Laura is always pretty mouthy and forward with her opinions while Lila is the smooth talking liar. They are the two who coordinate on the "we put a kid from school in the toilet" joke in 3x03. Lexis and Lynn are more measured in what they say, more often asking questions or making observations than stating opinions. Interesting that it is then Lexis and Lynn who have the more spiritually-related arcs in the show. This split is then reinforced by the plausibility of Ellie-pretending-to-be-Laura spinning the future of Ben having encouraged Laura to go into cosmology.