Reilly is a better kick than Brown, just for starters, and calling him mediocre is just more Scott Stevens Syndrome, making s**t up about whipping boys so you have a reason to rate your favourite young players above them.
If I'm picking our back 4 of players to play around Talia and Rutten right now, I'm taking Laird as the small stopper because he's currently better at essentially everything than Brown, Smith off one HBF, Reilly or Henderson off the other HBF, and then the final spot goes to best form/best match up depending on opponent, ie someone with a stacked forward line then Hartigan or Shaw are not out of place, a mosquito fleet then Brown is in the mix with Mackay.
I've watched Brown plenty enough. Simple fact, he's not as good as the angelic heralds on this board are proclaiming him to be. Has all the tools to be the next Doughty and a solid 150-200 gamer, but nothing more than that, and he's still yet to make it.
I liked Scott Stevens as a player he could perform a role and help the team win games. Reilly is just mediocre and has never cemented a position despite being given countless opportunities in every part of the field. The only position he looks better than ordinary in is playing as an unaccountable half back. Alas the opposition wised up and when forced to mark someone he faded back to norm. Hendo was a revelation in this role and has physical weapons that make him a far superior option.
Reilly will get a go in defence but no way will it be at the expense of Brown and I don't like Radars chances of playing many games injury dependant.