Off topic but I remember having a lengthy F30 vs B8 discussion about
A4/S4 don't make the cut. This list makes it clear that in NA, leasing is not the reason BMW sells more 3 series than the A4/S4. You can shave 50% off the 3 series sales numbers and the 3 series will still make the cut, around number 8.
I guess one could also read this list and conclude both the A4/S4 are exclusive
EBII '13 335i xDrive
320HP, Auto Sport, 19" 403M Tires, Prem, Tech, Cold, Driver Assist & DH pkgs
AW 2011 X5 35i Premium
300HP, Prem, Convenience, Cold and Tech packages