Design and wrist presence
The PRX's 40mm case is 10.9mm thick with a waffle-textured 'tapisserie' dial and an angular, brushed-and-polished 1970s silhouette that reads as the more premium design object. The Tsuyosa keeps the same 40mm diameter but wraps it in a rounder, softer case with a glossy sunray dial across several colours, and reviewers consistently note it sits more comfortably across a full day despite the similar footprint. Neither is wrong — the PRX is the sharper design statement, the Tsuyosa the friendlier daily wear.
40mm, sunray dial, rounder case

