The Samsung Galaxy s10 certainly has improvements over the Samsung Galaxy s9.
Check out the 'Vs' type YouTube reviews and tech blogs and spec sheets.
It obviously can depend on disposable income.
If this was my situation I'd accrue the extra funds for the s10.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "