Both were proponents of the Armanen Runes. What Spiesberger essentially tried to do was remove the "racist" aspects of the Armanic and Marbyan rune work and place the whole system in a pansophical, or eclectic, context.
Both were proponents of Armanen Runes. Spiesberger aimed to deconstruct the "racist" aspects of Armanic and Marbyan rune work, placing it within a broader philosophical framework.