BCP43002

It's getting near time to replace my rear pads on my GS. I looked at the front and saw green pads with about 3mm left. Close but maybe not quite time to replace. Since the rears have less I thought I would match the front to even out the braking. Are EBC's the green stuff the only green pads? I think the rears are OEM. I may replace with ceramic front and rear depending upon your views. Are all ceramic pads equal as prices vary? I have searched and seen that the green stuff were not praised by some members here and various pads such as Hawk HPS have their ups and downs.