FWIW, the guy who has been reporting on training camp and posting up daily highlight videos (Roy) has been saying that it's been fairly even but that Rex has been better. He has reported that Orton has thrown more interceptions, fumbled more snaps, and made more poor throws. Rex has made the occasional mistake and has fumbled a few snaps, but has looked better and made more plays. The highlight videos seem to support this, but, then again, they're just highlight. He has been pretty good about showing both the good and bad plays by each guy, though.