Kavanagh says she brought forward her opening date to July 26 to ensure she was Queenstown's first hop-on hop-off wine tour - Wine Hopper Bus launched the next day.
"Of course I wanted to be first - it's my baby.
"To be honest, competition's healthy, I just think there are right ways and wrong ways to do things."
Kavanagh, who has shifted to Queenstown, says she's not concerned with her rival's name, or its promotion of its "hop on and hop off" service.
"The name is nothing to do with me, there's a company in America."
Queenstown Wine Trail's co-managing director Heather McDonald says she doesn't want to comment.
"We just play our game and play our game really well.
"I just don't want to get into silly 'who-says-what', or 'did what' or 'did what when' – we have masses of competition.
"[Kavanagh] can feel what she likes, but you know what I feel is we all work hard for a living.
"I don't even know the lady and I don't want to know her, and I'm sad that you've told me her name."
Asked if she started her Wine Hopper Bus because the Marlborough operator was setting up in Queenstown, she says: "I have no idea where it arrives from."
But didn't she want to be the first local hop-on hop-off tour?
McDonald says that was of no concern to her, while noting her Queenstown Wine Trail, which set up 25 years ago, was the resort's first wine tour company.
Meanwhile she confirms her company's also started Hop On Beer Tours, which her son is running.
