
40 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Casio GST-B100 is the Tissot T-Race ($650) — common cross-shop and Racing chrono. If price is the constraint, the Casio EFV-620D at $120 (vs $385 for the GST-B100) covers most of the same brief. From the independents, the Jorg Gray Watches JG2500 is the standout microbrand take — racing chrono and Looks nearly identical. Stepping up, the Citizen ATTESA ($1,995) is where the same idea goes with a bigger budget.
Independent makers covering the same brief — usually with something the mainstream brands don't.
Established brands covering the same brief at a comparable price — same case size, similar movement family. Often the deciding click for a new buyer.
If the price is the only thing keeping you off this watch, these get you most of the way there for less.
Where the same idea goes when budget isn't the constraint — luxury upgrades and step-ups.