Tropical area: It is the area ranging from 23.5 degree north (tropic of cancer) to 23.5 degree south (tropic of Capricorn) of the equator. In this area, sun rays fall directly. Because of direct sun-rays throughout the year, the temperature of this region is high. Along with this, it also receives highest amount of rainfall as evaporation is more. Evergreen forests are found in this region
Sub tropical: This area expands from 23.5 degree to 49 degree north and south. Most sub tropical climate falls into two basic types (1) Humid Subtropical, where rainfall is often concentrated in the warmest months,and (2) Dry Summer, where seasonal rainfall is concentrated in the cooler months.
From Quora- Harshita Bharadwaj