My rule of thumb is that body armor is twice as important as head/leg armor, but that's not something based on actual statistics.
+1 or -1 AC doesn't make much difference anyway, it's the rule of cool that should guide you when deciding between similar equipment. Do you feel pretty? Then wear it.
+1 or -1 AC doesn't make much difference anyway, it's the rule of cool that should guide you when deciding between similar equipment. Do you feel pretty? Then wear it.