Getting the Silicon or the Germanium version of this pedal will ultimately come down to your personal taste, since they both sound amazing and have their advantages and disadvantages. If you are worried about having a pedal that is sensitive to temperature and you don't want to think about getting a different cable (center positive) to power the fuzz, the Silicon version is probably the choice for you. In any case, it is worth it to try them out side by side if you have the chance, and extract your conclusions by yourself.