those are the type of people you just have to ignore. i haven't lost to a DOHC yet, and i have a SOHC as well. a DOHC would be better to turbo because there are more kits out there. but as far as 15 extra horsepower, that comes a lot from the higher compression. and if you rebuilt the motors, they'd have around 8.5:1 anyway.
sometimes the SR is the way to go, if you have a bad transmission, or don't feel like ordering custom pistons for a SOHC and waiting for months. or waiting for somebody to fabricate a home made exhaust manifold for the SOHC, and SR is the way to go.
as far as all of the differences in the KA and SR, i don't know them all, i'll let an expert tell these. but the displacement is smaller and the peak torque and horsepower is higher.
__________________

02 Blazer X - 90 240SX w/SR
oh noes
|