Unique cache types under Stat Compare should include lab caches. Even if the person examined is not a paid member of PGC, their stats still say + x lab caches, so should still be reported here (and it should certainly be included when the viewing person and all the compared people are paid members).
And while on Stat Compare, it is still reporting statistics for those people who have chosen to not display their statistics. These should be surpressed in all PGC reports.