This post made me want to look for some stats, and here is what I found:
Critchlow: 637 passing yards with 6 TD's (This the only info provided by this week's Tennessean article. I'm hoping that, as a Franklin fan, you can fill in the blanks for INT, Rushing yards, and Rushing TD's for me)
Maher: 711 passing (8TD/3INT) and 367 rushing yards (2 TD/0 fumbles). (source: brentwoodhomepage.com)
I realize Brentwood has played 1 more game than Franklin, but Critchlow's average of 159 passing yards per game is not much higher than Maher's 142 ypg, and I'm willing to bet (but honestly I don't know for sure) that Maher's rushing ypg is much higher than Critchlow's.
After looking at the stats, it's clear that both guys are good QB's, but I'm inclined at this point to agree with CasualBystander's statement that Maher has more play-making ability than Critchlow. I've been to every Brentwood game this year, and Maher does a great job of getting out of the pocket under heavy pressure while keeping his eyes downfield and finding an open receiver. I haven't actually seen Critchlow play, so for all I know, he could be better at that than Maher, but I doubt it. It'll be fun to watch them both play next week to get a better comparison, I'm looking forward to it.