Is Cann Group Threatened by Cann Global?

So I thought I would put it out to see how people feel about this topic.

It has been said that QBL or soon to be Cann Global isn't anywhere near the success of Cann group.
It is obvious that the word Cannabis or "Cann" can not be patented ( as is evident by other Cannabis companies with  the use of Cann in their name)
So why did Cann group demand that QBL did chnage there name to Cann Global.

Surely if QBL was a small fish that wasn't going so well Cann group wouldn't waste their time, especially if they have no legal grounds?
What do people think?
Personally I believe they are very concerned about Cann globals potential success especially with a huge investor behind them.