I am totally with Raul on this; spending more money, even 2X more money, is in no way a guarantee of a performance upgrade. A difference, yes, but an improvement? Not at all necessarily. Since we are all fallible and human, once we've paid a lot more money and we do hear a "difference", we are very prone to interpret that difference as an upgrade.
I like to see what's inside the chassis, and I know what to look for. In my experience, more $$$ doesn't even guarantee more expensive parts, let alone better design and implementation.