I remember reading an interview with someone who had worked in the tennis manufacturing industry. He said that the Spaldings had the best wood quality. I think he mentioned the Gonzales models. Towards the end of the wood racket era, sourcing high quality wood had become difficult. According to him the TAD Davis rackets had less desirable wood.
Nota bene: I happen to like the TAD designs and I have one that I use occasionally. The TAD Imperial is one of the best looking rackets ever.