(First, I don't know why the Seiko 7S26 is called a "workhorse" movement. I know what it means, but where's the evidence? We bandy that word about based on really nothing. No statistics on which movement lasts longest. I have my dad's Valjoux 7750 from 1977, never been serviced and runs like a champ (or workhorse). In other words, I would call individual samples of any movement workhorses but without some kind of statistical corroboration I'd hesitate to so venerate any particular brand of movement.)
My impression of Japanese movements (Seiko, Miyota, Orient) vs. Swiss (ETA, Selitta, Valjoux) is that while both Japanese and Swiss movements can be quite accurate in day to day use, the Swiss movements are much more consistent in their day to day timings. In other words, my Orient Mako can be 2 seconds slow one day, 3 seconds fast the next. If a Swiss movement is 4 seconds fast or 10 seconds slow in a given day it will be consistently at those numbers day after day. I take that consistency as higher quality and thus I prefer Swiss movements. And it doesn't hurt they hand wind and hack.
Curious about other takes or agreement on this.