The various comments in this thread and the other one, about the London are intriguing....the views are so different. It's also as people are talking different racquets, so some people aren't evaluating it accurately.
Getting back to the OP's original post, I don't see how the London can possibly be more powerful that the PB10 Mid which has a much higher SW and static weight. The PB10 Mid is an an absolute sledgehammer of a racquet in terms of plow through and ability to penetrate the court.
How can the London with a 315g static weight and similar SW be anything remotely close? Unless you're talking purely about power from the stringbed?