They are not difficult, but some are a lot more fiddly than others. Vs seem to be a standardised design even between been manufacturers.
The only difference between canti and v is the straddle setup compared to getting a good noodle angle. The general use of bolt on pads on Vs make them a bit less fiddly than the post type.
...as for pictures just use Google image search on the early 90s brakes, or pop into the archive or bikepro website.
The later suntour (from 1993) used a nicer cable routed brake lever, this is the same lever as used by ritchey etc. The older lever points it right into the handlebar.
Cantis are a low profile silver or slightly gold tinted colour but that only from 1993, before that they where as different design, though still smart looking black,
Shimano, I find the br-m735 are a chunky naff looking canti, the m900 (from 1992) are so much nicer. But for a 1990/91 bike they go well. But othere can look nicer.
There is also the later M737 (from 1994) canti, a bit cheap looking but shares a design with the m900.