According to DAVEB only the automagics come with electric motor mounts. After reading my ESM, one engine mount(EM1) goes from soft->hard at 2000+ rpm, however, the other EM2 goes from hard->soft. The adding/removing battery voltage is all that is changed.

Would it not benefit wheelhop for 2K2+ autos by having both 'hard'? Assuming they launch below 2000rpm.

I'd guess the fluid becomes more viscous, ie soft, by ADDing voltage, so 2K2+ guys could disconnect the ECU->motor mount and run both hard at all times.

Probably doesn't make much difference though.