i have a g25 collecting dust in the corner, frien moved to aus and gave me that, its aright... but maybe im too used to m dfgt but its just not as accurate, or responsive... the pedals are better; slightly, but they need to be modded to improve their performance ( and it would appear that you're spiltting hairs when it comes to actual gains )
g27 is supposed to be quieter and a slightly better package all round..
if i had the money in y pocket OP go for fanatec, otherwise g27