Which marking system you decide upon often depends on the application and on the budget available.
Laser marking involves no consumables, it is quick and you achieve a high quality mark, however it is a more costly solution to dot peen marking. This type of marking is often better suited to marking on plastics for example in the pharmaceutical industry.
Dot peen marking, being the more affordable solution is better suited to a more robust application for example marking on metals or outdoors on production sites. A great example of an ideal application is VIN number marking on trailers and chassis in the automotive industry.