Racquet specifications explained: weight, balance, string pattern, and frame materials affect play style, power, and control in ways that matter for your game.
The racquet Roger Federer sold you was never the racquet Roger Federer played. That is not a scandal.
There is a strange gap in how recreational players shop for racquets. Head size gets argued about endlessly. String pattern has its own forum wars. Stiffness ratings get quoted like scripture.