Let's see...
Mac - We're both very mature, smart, sweet, shy and caring.
Goo - We're both social oucasts.
Bloo - We can both be easily distracted, though for completely different reasons. And I admit it, I can be somewhat lazy and unfocused.
Wilt - We're both kind yet very anxious and vulnerable.
Eduardo - We're both big, gentle and spanish.
Coco - I can seem a little weird to strangers, like her.
Frankie - We're both very caring people despite our tempers.
Mr. Herriman - We are both arrogant and uptight sometimes, but deep down, we do care about the others.
Madame Foster - We're both eccentric(But I'm also self-aware and conscious, and would NEVER steal from children
)