https://www.adventurecycling.org/def...est_OGrady.pdf
https://www.adventurecycling.org/res...blog/trek-520/
These are reviews of older versions of those 2 bikes. Both bikes will be fine for your intended use. The tubus racks are a big plus for the cinelli; the disc brakes are a plus for the trek.
I think they're very close but I prefer slightly the trek mainly for the disc brakes.