I think the comparison Wii-vs-PS3 in Europe is very interesting
Month 60:
Wii 29.5 million
PS3 25 million
End of Life (~Month 100)
PS3 35 Million (+10 Million from month 61 onwards)
Wii 33.9 Million (+4.4 Million from month 61 onwards)
Switch of course will surpass both.