Seems like your last 2 paragraphs contradict your first sentenceOne isn't better than the other.
Parametric gives you more control due to being able to select specific frequencies and target specific problem areas. More flexibility in control due to adjustable center frequencies and adjustable Q.
Graphic typically has more bands for broader control, but since center frequencies and Q factors are fixed so you have less precise control. What frequencies you can adjust and the Q of the filter is fixed, so you are limited to what the graphic EQ offers.
//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gifSeems like your last 2 paragraphs contradict your first sentence
With the availability of digital processing, analog trunk-mounted processors are obsolete.