Which two distinct shipbuilding traditions produced the 15th century european vessels of exploration?

The caravel of the 15th and 16th centuries was a ship with a distinctive shape and admirable qualities. A gently sloping bow and single stern castle were prominent features of this vessel, and it carried a mainmast and a mizzen mast that were generally lateen-rigged. Although the caravel had already been in use for hundreds of years, it developed into an incredibly fast, easily maneuverable vessel by this time, which was noticed by eminent people. This extraordinary vessel gained fame with the Portuguese and Spanish voyages of discovery. As Inigo Arieta (who escorted Columbus out to sea in 1492), the Commander of the Biscay fleet put it, caravels were ‘’corredoras extremadas, buenas para descubrir tierras (1).” Columbus’s ships Niña and Pinta were supposedly caravels, and Columbus repeatedly praised his favorite ship, Niña, for her great speed, maneuverability, and safety (2). However, as is evident in the historical record, not all caravels were designed the same way, and many changes were made throughout the history and development of the ship. In essence, it is hard to define the ‘pure’ archetypal caravel (3).

this question shoud be under spanish category, not