I learned in a 161 and fly a 180. The 161 was usually well behaved in the stall but I did once experience a wing drop (which the instructor rapidly caught) even though I was being careful to keep the ball in the centre. I have flown the 180 for 4 years now and regularly practice stalls - far more than I did whilst learning - in every configuration and never once has the behaviour been anything other than impeccable. I agree with Waldo that the sink rate if you get slow can be impressive though! A choice between an older 180 and a newer 161? The 180 every time!