BMW really....
No hatch in the states, no coupe where I am. They give us the M135i thinking no one here wants the coupe (not true), and they give US "135is same thing as M135i but different body shell" thinking no one there wants the hatch (prob. no true either). So where there is M135i, "135is" isn't available. 135i technically you can't get it anymore (at least not for us), so there is no overlap. yawn.
http://www.m-power.com/_open/b/varli...lang=en&x=2807 this guy says driving experience is very different for the M135i/135is from that of a 135i. I bet there are more than enough tuners here to prove him wrong.
Why, BMW, who's making those decisions? $$$ eh. I wonder if you pop a firmer suspension on a regular 135i and LSD how's that compare to the M135i.