What is the difference in the two? I have a pair of History Fuel Cell and just won a pair of Ghost Oil Rig II. From pics, I can't tell. Is it just a pattern difference? Both are the polished black frames.

I've felt like the ghost texts were usually silver or gold accents while the history text is the pattern name and usually black.

The font on the History Text is thicker than on the Ghost Text. The Ghost Text is definitely a more subtle design.