Caliper brakes vs. mechanical disc
I'm looking into used bikes. For what I am looking at, I tend to see my options as either mechanical disc brakes, i.e. TRP spyre C, or calipers. The calipers are usually Tektro brakes which I've heard aren't great, so a possible plan would be to replace them with 105s. However, in the age/price point I am looking at, I'm usually looking at Tiagra 4600, which I've read have a different pull strength than 5800 105s.
The short question is, how do mechanical TRP spyre C brakes compare to 5800 105 caliper brakes with Tiagra 4600 brifters?