asrocks z68 extreme3 gen 3 bios the same as extreme4 gen 3

looking to update bios on asrocks z68 extreme 3 gen 3 found a thread here for extreme4 gen 3 where you guys modded it and updated it and i was wondering if they are same bios looked on asrocks website and they seam to be the same mobo except for the lan chip if not the same bios did you guys ever mod and update a bios for the ext3 gen 3 like you did for the ext4 gen 3
thanks for any help