With G+, I make a conscious decision about privacy every time I post something. Every post I decide where it goes. G+ keeps it front and center. Facebook has it 4 clicks hidden away and then doesn't make it obvious you can include lists when it says "These People: Specific People".

I have never used lists on Facebook when posting (I have used them for messaging though... which I found annoying due to the limit to the number of people in a list).

Circles, on the other had, I use with every post I make.