I am not knowledgeable on jet engines but I have found 1500 N Turbomeca TRS 18-1's specs here.
While TRS 18-1 consumes 1.20 kg/h/daN (which is 33.4 mg/Ns as listed), KTJ1750 uses 1.17 kg/h/daN. What am I missing?
Well, KTJ-3200 has 1.20 kg SFC. Compared to that KTJ-1750 delivering much less thrust yet has almost same SFC.
And you are comparing an engine from 1970s with an engine from 2020s. I don't think that would be relevant.