Both have less is more approach with the horror but I must say that I found Dead Stock to much more enjoyable. Some of the acting in Akuryo was funny and I assume that's not what they were going for, while Dead Stock seemed more natural and creepy.
They both have different story-line, tone and feel, but one thing is the same: the female leads can see the supernatural (ghosts). Akuryo Byoutou is much more darker than Oh My Ghostess.