If G2 didn't make it to worlds or didn't make it out of groups you could maybe make this case, but they got 2nd. They got 2nd at the most important event of the year, first at the other prestiguous international tournament of the year (to which they qualified by winning their league, something FPX failed at). FPX winning one BO5 does not outweigh their lack of 2 titles given how close G2 were to that title as well.
One LPL title > two LEC titles