A laser gives exact targets; a handheld GPS gives easy course context on a dedicated screen. Answer 5 questions to decide whether one device or both fits your round.
Choose the information you would reach for first.
A handheld separates information from your wrist or phone.
Specialized tools add redundancy but also flexibility.
Think about all-day or multi-round golf.
Use this as the final tie-breaker.
Best when exact pin distance, point-and-shoot speed and a dedicated laser workflow matter more than whole-hole GPS information.
Best when you prefer large at-a-glance front/middle/back GPS information on a dedicated handheld with a high-contrast screen and solar-assisted battery architecture.
Best when a handheld manages hole/green context and a laser is reserved for exact pins, trees, bunkers or practice targets.