Play Work Play Studio

Don West nailed it:

Public criticism from your competitors is the best publicity you can get. When they point out their competitors’ weaknesses it ALWAYS causes people to find the weaknesses in their own products and services and investigate the competitors’ product. Many switch to the competitor.

The moral of the story is: Keep your mouth(and keyboard) shut, and make sure your product is better than theirs by a long shot. The market will decide who is best and score is kept by sales…or users in the case of OS software.