Yes, because Houyhnhnms and Yahoos are completely opposite to each other as Houyhnhnms symbolize order and Yahoos represent anarchy. For instance, Houyhnhnms are logical and can control their emotions, therefore appear emotionless and cold-blooded. Whereas Yahoos allow their instincts and emotions to reign and thus do not look rational rather they are chaotic and brutal, however Houyhnhnms look complete clinical. Therefore, we can say that both symbolize two contrasting elements of human psyche and ultimately unappealing.
Yahoos and Houyhnhnms as Two Contrasting Elements of Human Psyche