XnView Software

ACDSee has very useful options- zoom lock and pan lock.
I'll describe the pan lock option.
It means then you browzing folder pressing page up and down the coordinata of the point that is shown in the centre of XNview window remains the same. XNview has not this option and after pressing Page up/down in the centre of window the centre of image is shown. It does not convinement then user compares different images(for example the face on series of the full-height photos to select the best).
To understand this better look ACDSee.

I realize this might not be exactly what you're looking for, but you might try 1.90's compare function. It's a n-up window with a slice of each image, where all scroll whenever you change one so that they're always coherent. Currently, however, it's restricted to existing images, not unsaved edits.