First training bike

Hi everyone,

I’m buying my first proper training bike and starting to train consistently with the goal of doing a triathlon in the future.

Im looking for any tips, ive narrowed doen the search two there two bikes, price is the same, which one should i get?

Bulls Harrier Disc 1
Aluminium frame
Carbon fork
Shimano Sora 2×10
Mechanical disc brakes
Wider tires
Approx. 10.4 kg
Size 51–52

Scott Contessa Speedster 15
Aluminium frame
Carbon fork
Shimano 105 2×10
Rim brakes
Vittoria 700x25c tires
Approx. 8.8–9.5 kg
Size S / ~52

Thanks in advance