Massively, I had my jb4 on my car for about a year before I upgraded to the wireless kit running map 1.
I loved map 1, made a noticible difference and wondered just like yourself how much better the other maps could be.
Map 2 is more eager than map 1, I wouldn't say it makes a noticible amount of peak HP, however the torque through the mid range is greatly increased.
I only used map 3 to log for map 6, so I only ran it for about 20 mins.
Map 6 is stronger again, it's quicker everywhere throughout the Rev range, its another level of fast.
Maps aside, the firmware update smoothed out the maps on partial throttle, the power feels far more linear than when I had the jb4 without the wireless kit.