The Kinetta uses a laser that is shone on the film, and the reflection is measured. For each film type, one has to do a calibration. The height of the laser is adjustable, therefore one can use pretty much any format from 8mm to 35mm, incl 22 and 9.5 mm.
The problem with this approach is that when having film with mixed stock, it can lose track of what is a sprocket and what isn´t. You end up having to do a lot of clicking trying to keep the image in frame during scanning.
Other than that I am not sure as to which sensors you refer to - the Kinetta has a LED with R, G, B and White.
The gate on the Scanity has a patent, it is completely round and uses a line scanner; thus the film stays very flat on the surface.
Vintagefilm - I have not used the FilmFabriek scanner myself, so cannot comment on the software. sorry.