That was a good answer, and I agree. And I dont think there is any Power difference between brands, as long as you compare Apples to apples.
The most important is probably the right plug for the right Application, and I would Guess if someone "only had problems" With say Champion, it is probably not the plugs fault, but the installer, who installed the wrong heat range or too big gaps in low performance ignition or something else weird. To be honest I have never had any problems With any plugs, except if I have not checked the gap before putting them in, when they have been dropped on the floor before I got them.. (lazy installer problem again
) I have learned that, and ALWAYS check gaps.
And I like NGK because it easy to understand their numbers and letters, because that is what im used to. And the gap is always spot on if they are ordered for the right motor. And they make all kind of variations of plugs.
Here in Europe they sell some other brands, they probably dont sell in the US, some very cheap variants of Eyquem and others. And I feel there is a difference in the quality of the Product. But it could only be prejudice from me, or that they make some extra cheap junk stuff for some markets, I have had several cars at work that run poor With these "weird" brands.. Who knows.. And ignition systems is sometimes weak on some types of vehicles too.
But what I dont like is the price here in Norway, it is not just on NGK, it is on all the other brands too. If 8 costs the same or even less in the US than 1 plug does in Norway there is something really wrong..