It is worth more in the shops and its more valuable in general, I have tested the profit from mining only hq ore and hq minerals it is almost the same amount if you convert them into metal parts and gunpowder.Oh and you get 4, from 3rd ore it goes to 20 min then wait 20 or so second for it to go down to 19 then collect 4th ore.
If you want to make enemies, try to change something.