I'm voting Reach because it had more of a halo feel to it, even with bloom and the other problems it just seemed more fun to play. With everything like ordnance, constant sprinting and no weapons being on maps, halo 4 just doesn't seem as fun.
I voted for Halo: Reach being better simply because Halo 4 doesnít yet feel like a complete game. Donít get me wrong, Iím enjoying playing 343ís Halo game but it has so many issues ranging from weapon balance to network problems that I canít really call it better than Reach. Maybe Halo 5 on the Xbox 720 will finally be the definitive Halo experience but until then the high-water mark for the series is still Halo 2 in my book.