All that aside though there are really only two "systems" that I even remotely care about:
The first is the system that is the quintessence of magick, mystecism, and reality itself. It is beyond any culture and symbol set. It is reality itself in all of its fullness and layers of density from the most material and illusory appearance to the most sublime and ultimate akashic height.
The second system in the one that the individual uses to eastablish connection with the first, and than uses to express it outwards to others as teachings and works. Make no mistake everyone has their own system. Even two people initiated into the same cult on the same day and do everythng the same have thier own system in the end.
These are the only two real systems of magick.
The others, be they GD, Vajrayana, Solomonic Magick, Hermetics, Chaos Magick, Toaism, Vodou, Voodoo, Thelema, Temple of Set, or even my own emerging system of Sorcery are all just convenient classifications. They are important distinctions for establishing the esoteric language that you are going to speak in and perhaps even the powers, principalities, and entities that you aree going to deal with primarily. But choosing one over another or being concerned with whether one does the same as the other is just as pointless as worrying about whether Mississippi has as good Pizza as New York does or whether New York has ribs to rival Mississippi.
These sub-systems that exist between the ultimate and individual expresessions of magick have different methods and in some cases different goals. It is up to the individual to decide which goals are important and than attain that Great Work.