The only question is, is the price difference between 2 bikes worth the hydro discs. I will disregard the better shifters, since I never had a need for better shifting capability that Tiagra, but I always had the need for better brakes, better than mechanical disks (like TRP Spyre). I never had hydro brakes on a road bike only on a mountain bike very long time ago and I as remember, they were not perfect. Long decent could make the brakes very mushy and less effective.

Even if I just wanted to update brakes and put Shimano Tiagra hydraulics the price is simply ridiculous, one brake cost 200 eur: https://www.bike24.com/p2327124.html