In my opinion, he does not look Asil to me as the posture is not right. His tail is held a weird angle but pictures are hard to demonstrate what a bird looks like all day long. if i were to guess he is mostly if not all O shamo.
According to the SOP, OShamos are bigger than Malays at least for the Cock. the Shamo cock should be about 11 lbs. malays are about 9 lbs. the hens should both be about 7 lbs.
As far as stature goes, the OShamo is taller due to it standing more erect than the Malay.
i purchased a trio of Black Breasted Red Shamos in February and i have 5 three month old babies running around. They are so awesome! i get home from work and they come running out to the truck. i keep sunflower seeds and they eat them out of my hand.
here is a pic of the parents
My camera...