The average New Zealand home chews twice as much data each month, as its Australian counterpart

Chorus recorded its busiest day for ultrafast broadband fibre on November 2, driven by an update to the video game, Fortnite.

Of this year's 17 biggest spikes - 14 came from Fortnite updates.

Network strategy manager, Kurt Rodgers, says fibre is the main difference with Australia.

He says it's key to having good quality broadband at home, but across the Tasman they're mainly using copper.