Lithopane Orientation

I finally got some Chemcast 1/4 ivory colored acrylic. I have been wanting to do a lithopane for awhile. I am about to make my first "sled" for lithopanes. And my OCD (obsessive compulsive disorder) kicked in high gear. Which orientation is better? I want to do 8 x 10. Which means I can lay it out portrait or landscape! Which is faster? which is better detailed... or is there a difference?

Bert,
It should not make any difference as for detail, as for faster lay it out both ways and see what it says when you try to upload it to the card.

I think the level of detail varies depending on the pattern you settle on - some would carve better horizontally than vertically... carving on the two axes are not equal, after all... close, but not perfect.