Depends on the list. The concept is quite simple. Big people with free attachments. However the transition to practical play is 100% different. You will be having worse economy than the typical KHexp lineup (bigger people), and usually not enough bodies to take complete advantage of your box.
On the other hand, you will be having access to cards that KHexp has and free 0F followers to attach each turn. I am not sure if this is worth the transition to KHexp from Halls of the Forgotten or Bishamons.
Crab Clan * Mojomaker * Tactical Loyalist * Slightly Kolat * Almost Jade Hand * Officially Elite * House Mormont * Dothraki * exp.6