My parents are on Vodafone in Queenstown, on an old plan which they're about to upgrade.

I am wondering if there's any performance differences between Vodafone and TelstraClear, given that they're both on wholesale ports from Chorus. Of course their backhaul makes a big difference - do they hand over to their own backhaul in Queenstown or somewhere else? (TelstraClear has fibre backhaul through Queenstown). 

They do various low bandwidth activities, plus video chats to Australia mainly.