variant
n.
A particular instance of a work with differences from other manifestations of the same work.
Notes
Used primarily for printed works, 'variant' can apply to any work in any medium. Two photographic prints made from the same negative may be variants because differences in cropping, exposure, and development.
Citations
Harrod 1977, p. 862 [Variants] are frequent in hand-printed books and are accounted for by the fact that mistakes were noticed and the type altered during printing, the sheets already printed remaining untouched.
