Makes resources more sparse than base game. You will need to use trains much earlier to get resources. Game will be more difficult especially with higher enemy settings.
Tweaks
Mod category: Tweaks
Small changes concerning balance, gameplay, or graphics.
You will need to contact author of that mod pack to provide ore configs. I'm creating those if there are few resources but that mod pack seems to pack more and different mods add them.
Also all the mods have been released a day ago and they might still change a bit.