PreciousStones vs ProtectionStones

Hi,
I have a problem on my server, I dont know if I should use PreciousStones or ProtectionStones, both do almost the same, but I dont know which one consumes more resources of my server. Until now I have been using PreciousStones, and is really heavy (for my server at least), but the PreotectionStones is "linked" to the WorldGuard plugin wich is heavy too. I also have WorldGuard on my server, but with a few regions protected, if I use ProtectionStones, te nomber of regions will increase exponentially, that may affect the server performance?
So my question is, wich one do you recomend me to use? performance related.

Thank you,
Besrt Regards.