Whilst the Nismo pad is an improvement on the standard I would still say the Ferodo has the edge.
The material on the Nismo is a good friction compound but what it lacks is modulation which is where the Ferodo scores.
Many people talk about pads purely on how quickly they will stop the car from a hard stop, this is all well and good however performance driving requires differing degrees of modulation so that the brakes are not just used for stopping but for setting up the car pre-corner, this is where good modulation can pay huge dividends for fast B road driving and track driving. It can make quite a serious difference to how the cars aspect will be comming into a corner.
That sounds impressive. Shame I still don't fully understand.