All PG exit velo's are WOOD BAT using a Pocket Radar.
PBR is a mixed bag. Mostly the exit velo's are metal (BBCOR - sure, but nobody is actually checking bats). Sometimes the exit velo's are in wood and lately they sometimes mark it on the profile as such. But usually not. The only PBR events I know of that are wood bat are of the "Procase" variety. Although at the recent New England Procase metal and wood bats were used (they put out a note stating players could use one or the other).
So if you want a more accurate comparison of where your player is use a wood bat off a tee and compare him to his peers using PG exit velo's.