National League competition is a lot higher and more competitive, the coaches role is to put out the strongest team to help the team win.
The focus is more on competition as opposed to making sure all the players play equal minutes.
The ethos behind CVL is to give all the players equal playing time and help them gain experience, confidence during matches which will help them develop.
Players selected as National League players should mainly focus on NL games, however there are some NL players who will see limited minutes (these players are known as NL Development players – please see parents/coaches meeting minutes 2017-18) during NL matches. I would then recommend these players focus more on CVL to gain more match experiences.