Don't overthink this.

ALL quality brake systems and mounts are more than adequate to the task and time proven. It's more of a question of what best suits your needs.

Cantilevers have a distinct advantage in that they're not affected by vertical clearance as are caliper brakes of any design. That's one reason Cantis are the preferred rim brake system for mtb and touring bikes who's fat tires and/or fender clearances mean long flexy calipers. OTOH- cantis impose some stress on the stays and blades, which should be selected with that in mind.

So consider the vertical clearance (brake reach) you'll need or want, see what's out there and speak to the builder before deciding which ONE type of brake makes the most sense for you.