For all effects related to race, a ogrillon is considered an orc in addition to being a giant. In instances where the effects based on the two would conflict, giant type supercedes orc subtype.
Ogrillons are covered with horn plates which makes wearing armor uncomfortable. Ogrillons suffer an additional −2 to armor check penalties, attack rolls, and all skill checks that involve moving, including Ride when wearing armor. It also imposes an additional +10% to arcane spell failure chance.