The B and The G have a lot in common, it's true, but in certain regards, their differences couldn't be more pronounced.Take their interest in - and their appetite for - fruit as an example.
Earlier, our Sainsburys delivery, shopping at the doorstep, our bags including one or two items not found on our regular list.
The G finds the first such item and hoists it aloft, the disdainful look that she reserves for fruit, vegetables and all things organic forming on her face.
"I don't like it," she says in a defiant tone.
There is silence for a moment as she thinks it through.
"What is it?" she asks.
The fruit in question is, I explain, a mango.
The B's ears prick up at this.
"Oooooooh!" he squeals in delight.
Had a double decker-sized Haribo just rolled up at the kerbside, he could not have sounded more excited.
The G's interest is piqued a little later as The B tucks into his mango, although she cannot be persuaded to break her strict rule (that is, if an item originates from a tree, bush or plant, or if it grows in the ground, crisps excluded, she doesn't eat it).
Instead I settle for trying to teach her some different fruit names.
"Mango," I say.
"Mangy?" she replies.
"No, it's mango."
"Mango," final attempt, really emphasising the 'o' this time.
"Like Stingo?" she asks, referring to her favourite character from Fifi and The Flowertots.
Not quite, but in such situations, I find it's important to focus on the positives as much as possible.
That in mind, it's Word Association 1 Fruit Identification 0.
So the differences between the pair persist, The B underlining as much a little later.
Having injured his back during an unfortunate seesawing accident, I promise him a treat, thinking of a chocolate biscuit that is no use to me under the terms and conditions of the Floorboard Preservation Programme.
The B, it becomes clear, is picturing something different in his mind.
"Is it a passionfruit?" he asks.
Thanks to everyone who has stopped by this week. Please keep on coming!