Sounds like marketing in action; I'd call it a two element colinear
with a decoupling section at the bottom. Just for giggles, what gain
does Witchcraft claim?
Howard

You maximize the gain of a colinear by separating the current loops as far
as possible ( see the graph in the ARRL Antenna Handbook of gain vs current
loop spacing). By making the top element a 5/8, then a 1/4 wave phasing stub
( 1/8 long), the bottom element is realized as an inverted 5/8. This places
the current loops 3/4 wavelength apart. (Compare this to 5/8 separation if
the bottom element were fred as a traditional 5/8- and require a longer
stub) .The bottom of this element is then voltage fed- diminishing the need
for radials.

Dale W4OP