I think the 7" screen size of the 898 would be the biggest thing in that a person could see more detail in the side imaging. I have seen the 798 w/ a 5" screen and while it is nice, the 7" would be much better. As well as the pixel size. I am in the same boat trying to decide which finder would be good for me for many years to come based on initial cost, features, support, etc. I appreciate the differenct opinions and thoughts from those that have this unit.