Titanium a little weaker, mines and manufactories a little better.
Tectonic scanner is said to be overpowered because it allows instant access to titanium. That's because it is the only strategic resource that doesn't need a special improvement to use it. You can know where oil and geothermal are but still have to research to access it.
This creates a titanium mine improvement available with engineering which does not get the standard mine yield so it gives 2 less production and it costs 2 energy maintenance like other strategic resource improvements.
I've also increased the production from mines and decreases the unhealth from manufactories. So now titanium might not be the end all and be all of production.