I couldn't stand the legibility issue with GW-9400-1B (even on broad broad daylight!). Bought a positive display version GW-9400-1 yesterday. I'm happier now! Here's a picture of them next to each other
GW-9400-1B | CASIO
Casio GW9400-1 Review - GearLab
G-Shock GW-9400 PROs & CONs from users and experts — CasioFan Magazine
Casio G-Shock Rangeman GW-9400: All Models Released
GW-9400-1 | On the land | G-SHOCK | Timepieces | CASIO
Casio GW9400-1 Review - GearLab
New GW9400 Rangeman - random factory reset | WatchUSeek Watch Forums
Casio G-SHOCK Master of G Rangeman (GW9400-1B) | Everyday Carry