Orcs on the march - difficultly the same as AP?

[malcolmm]

I only played AP once, at normal difficulty. Great fun, but since I had previously played Legend, it was pretty easy.

I want to play Orcs on the march, and I am wondering what difficulty to choose. If I were replaying AP I would choose hard. I am wondering if Orcs on the march is of similar difficulty as AP, or have the changes made it more difficult.