Next time you run across some dunderhead rattling on about IQ, meaning Image Quality, mentally pronounce it as "ick". For example:
The J9400 has better ick at high izzos than the J9300 does.
This should provide a useful referent for how actually useful and interesting this sort of thing is. Obviously if you shoot sports, blah blah blah, if you don't know by now that in the first place I know, and in the second place I don't care, you need to spend either more or less time reading this blog.