I've not heard it called pressure matching before, but I believe most places refer to it as custom valving, and yes you can get it done fairly easy by most performance shock manufacturers. Call them up, talk to the tech guys about weights, rates, usage, and they can dial in what you want in any shock that is not bargain basement in price. In higher end shocks it is almost a necessity. Yes, it will cost a bit more, but how much more depends on the company and the shock package.

Is it better, it depends. It certainly means you don't need to dink around with adjustments. This can be good or bad depending on application and end user's technical exertise.