I would say that the quality of C&J Bench is far better than that of Church's. I heard a rumour on Saturday from the cool salesman in C&J, Burlington arcade that Church's are going to introduce shirts & suits! ha ha they're a joke now.
EG's of course pwn them both as would Lobb's and G&G's but I don't own either of those two so can't fairly comment. In my limited knowledge though I would say that these three are the podium sitters.