I think the analogy is to construction, not engineering.

In construction, architects and designers do different jobs. The software equivalents of those roles map reasonably well to the construction equivalents.

In my (software) experience, the terms are basically interchangeable. Some people will violently defend “architect right, design wrong” and others the opposite, So uh, pretty hard for me, a normal person, to care much about which word is right for the “you sit down and think before you build” part of software engineering.