Spark plug confusion

[02t6]

Hello I am trying to gain some wisdom. I am doing some long needed maintenance on a friend's car which her late father always worked on. It is a '02 s80 t6 and I would like to know which plugs to use. I did some searching on the site and still have questions. The plugs I took out are Volvo 30637308 and look to have the smaller platinum tip. I've read both opinions, to use the basic or Volvo copper plugs but on the hand others say to use the fancier platinum/iridium plugs. I understand the copper won't last as long, but I found getting to the plugs was easy enough(i've done lots worse). I guess I really want to know if the current plugs are the correct ones and I should just get another set (8692072 ?) or just basic Bosch FR7DC plugs are better for the turbo.

Sorry for the long winded post. Any help or guidance would be greatly appreciated.