Bro, I bought my 2017 GTI S for $23k brand new. At the time, I was looking at Focus ST’s, and the cheapest around (base mode) was $28.5k. Focus ST’s were definitely more than the GTI then. Not anymore though, because new GTI prices have gone up (I got my GTI at the perfect time), but back then, the ST’s were substantially more for the base model versions.
Also, the GTI is better in every way. Much nicer interior, more interior room, better mpg’s, more tech, much faster when tuned, the list goes on. The ST sounds better, but that’s subjective. Stock, the ST handles better, but if both cars get coilovers, the GTI handles better.