Running a business tests your character in very hard ways.
It deals with livelihoods and money which seems to bring out the worst in people.
You’re going to get asked about competitors and a sure fire way to show your customer how poor your character is is to talk poorly about your competition. There are things that they do better than you, and you should just acknowledge that.
What type of person do you want to be? Your daily interactions with clients shows your character to them.