I've got Wise Critical and I do noticeably more crits during Wise than Brave, from what I've noticed without specifically counting.

Feels like about 1/3rd of every hit is a crit during Wise, and I have to do more than 10 attacks before I get a single crit from the front (don't have Brave Crit).

Crits still aren't very good, though. Just something I grabbed to get me to switch stances more often.