personally, I think it's es (´꒳`)♡ the way I see them, wb feels/loves very intensely while es is quieter/more gentle. they are both very attuned to each other but I think es has a tendency to show that in a much more soft/subtle way whereas wb loudly announces his affections, hehe. they balance each other well and I think bring out a bit of their own sides in each other, though!