There’s not much to it really. Mecha anime is usually not just about awesome robot fights, but is also usually a metaphor for something (Gundam=the horrors of war, Evangelion=the horrors of parent/child relationships, Macross=the horrors of Protoculture, etc).

So in the comic cuts right to the chase and asks each respective pilot what their mech represents. It turns out the answers are anti-climactic.