User blog comment:Ohmpahkan/Monster Hunter Frontier: Hardcore monsters/@comment-1011548-20110225090603

Espinas: Purplish-orange tinge on parts of his body, most noticable at the base of the horn. - Rages in one hit. - Just a generally revamped moveset.

Orange Espinas: Some of his spikes are a bit shinier. - Can spit poison into the air, that then falls around him as a rain of poison fireballs. Apart from that, I didn't notice much difference.