There is no difference between saints or any other PerlMonks registered member when it comes to how XP are awarded. Votes cast have the same liklihood of resulting in an XP gain, node reputation has the same effect, and being logged in in the past 24 hours has the same probability of awarding XP in the same quantity.

Actually, I take that back; there is one difference. Lower-level monks do get a little XP perk for using all their votes in a given day. Higher-level monks don't get that.