Been in sales or sales management for a good while.
Rule #1. Never, ever, attack a competitor.
It elevates them in and lowers yourself in the customer's eyes in every study done.
You sell the strengths of yourself, your company, and the product. You should always show where your product excels beyond the competition and explain why that is important, but do not mention the competition.
Great post, No matter what I am buying, it is a major turn off for me when the main focus of the salesperson is to deride the competition.