Road or trail: which shoe for which run
Road and trail shoes look alike from a distance, and plenty of runners use one pair for both. That works up to a point. Knowing where the two differ helps you decide whether a second pair is worth it.
What a road shoe is built for
Pavement is predictable, so road shoes spend their weight on cushioning and a smooth roll from heel to toe. Outsoles are flatter, with harder rubber placed where wear is heaviest, and uppers favour breathable mesh because there is little out there to protect the foot from.
What a trail shoe adds
Trail shoes trade some of that smoothness for grip and protection: lugged outsoles, tougher uppers, reinforced toe caps and often a firmer ride that stays stable on uneven ground. On asphalt, those lugs feel noisy and wear down quickly.
When one pair is enough
If most of your running is on roads with the occasional dry park path, a road shoe will cope. If you regularly run through mud, over rocks or down steep hills, a trail shoe pays for itself in confidence on the descents. Many runners end up with both and choose by the forecast and the route.