the 1.2'' drop is for the coilover with the serial # that ends in "06". which is advertised for the Mazda3. The serial # that ends in "10" is for Speed3 and that has an inital drop of 0.8''...
check it out at tirerack.
Actually the H&R variant for the Mazda 3 is 29197.3. MS3 is 29197.6. I think you might have referenced V1's during the comparison.
http://www.tirerack.com/suspension/...ar=2009&autoModClar=s+Grand+Touring&brand=all
http://www.tirerack.com/suspension/...daSpeed3&autoYear=2009&autoModClar=&brand=all