i think you are missing the point here
vauxhall, instead of trying to figure out a way to tame the pwoer and torque from their engines (which are fairly good and probably that little bit better than the ford usints at most times) they have not bothered
whereas ford have kept the power the same sort of levels with the st as opposed to the rs but the torque has gone up across the range because of the extra 300 cc and cylinder, therefore making the driveability that much better

in the astra it's all or nothing, with the st it's a liniear power delivery which makes things much smoother and less snappy, even thought they are just as quick as each other in the real world straight line stakes