Furcas, confusion of sigils? Options

Well, i am kind a new, but i am enough experienced to evoke some of the goetian spirits!
I study some of thems, and i found FURCAS:

Furcas is the Fiftieth Spirit listed in the Goetia, who governs 20 Legions. He appears as an old man with a long beard & hoary head, carries a sharp weapon & rides a pale-colored Horse. He teaches the arts of philosophy, astrology, rhetoric, logic, cheiromancy, & pyromancy.

ok, it's all ok, BUT, i saw two different sigils, and i don't know which i should use (IMG:style_emoticons/default/13.gif)

(IMG:http://academyofsorcery.com/courses/ACS/furcas.gif)

(IMG:http://www.deliriumsrealm.com/delirium/images/seals/furcas.gif)

if anyone want's to know why i want to evoke him, it's because i want him to help me whit philosophy, astrology, rhetoric, logic, cheiromancy, & pyromancy. (IMG:style_emoticons/default/13.gif)

Try meditating on one . . then (later), meditate on/with the other. lather,rinse, repeat.
See which "feels" best, which brings on the clearer connection . . . which generates more anything.
Whichever it is . . . that may be the one.

Or try what some of us more far-out magicians do . . . divination!!! (IMG:style_emoticons/default/smile.gif)

plus, look at each of them, they each present slightly different "references" . . . which fits you, your working or your interpertation of the spirit better.
note: omphalic dots and deliminating lines. To me (a personal interp only) these suggestion solar and/or alchemaically salty/earthy/bodily (and maybe elementally earthy/watery) aspects . . . and maybe even a bit'o air.

i want him to help me whit philosophy, astrology, rhetoric, logic, cheiromancy, & pyromancy

thats quite a list . . . you may want to consider focusing on a single aspect of yourself (or life) that you particularly want a spirit to interfere**sputt#cough . . help with.
Plus, at fourteen . . . be extra careful that you maintain your inner/outer equilibrium . . . I'm sure those would be energies your, frankly, young psyche would struggle with.
(no offense meant . . . )