Yes, I believe that the gearbox has three change 'maps':

NORMAL, which is, er, normal, upchanging relative to throttle position around 3,000 rpm.

ECONOMY mode - button on the gear selector engaged (which I tend to use on the motorway), which changes up sooner (around 2,500 rpm relative to throttle position) and doesn't kick-down as easily.

POWER mode, which holds on to the lower gears under very hard acceleration up to the redline (or just before). I've not managed to engage POWER mode with the ECONOMY button on (which makes sense).

One of the things I've noticed with driving the SVX is the stiffness of the throttle pedal, I find it quite hard to open the throttle all the way, past about three-quarters, it requires quite a lot of effort. Do you find that on your JDM car?