I just posted an interesting observation, I had not realised before, about scanners which fix the platen's x & y position relative to the camera position (like many (all?) V platen scanners) as compared to TIFLIC, which does not fix it.
Essentially, since the TIFLIC platen is not fixed relative the camera, neither is the book and so smaller books, with smaller type, can be positioned in the centre of the camera's field of view (rather than being forced to one side as with fixed platens) so the camera to be zoomed in unitl the page fills the image (which is not possible with a fixed platen/camera design).
This means for smaller books -- like paperbacks which often have small type -- fixed platen/camera designs don't allow the full resolution of the camera to be used to image the page, which of course reduces the image quality of small pages if you have to enlarge them to see them better and/or also compromises OCR quality of smaller type on smaller pages. So this maybe an important consideration, when choosing a scanner design, if one is scanning a lot of small books with small type (like paperbacks)
Full details and schematics showing the issue here: