It will hard for me because BB13 housemates are much more interesting than BB12 for the most part and it's a much better series imo. I will do this properly though with 8 males and 8 females and some heroes and villains. Wanted to chose Arron instead of Jay, but chose Jay instead to make my list complete 50/50 and four male and female from both series.
Males
Aaron
BB12
Harry
BB12
Benedict
BB13
Adam
BB13
Chris
BB13
Scott
BB13
Anton
BB12
Jay
BB12
Females
Lauren
BB13
Caroline
BB13
Lydia
BB13
Deana
BB13
Heaven
BB12
Rebeckah
BB12
Faye
BB12
Tashie
BB12
Not bad at all considering I had to choose half from BB12.