  Recent developments and results on the comparison of gluon to quark jets are
discussed. A most important topic is the introduction of explicit energy scales
of the jets. The scaling violation of the fragmentation function and the
increase of the multiplicity with scale is shown to be directly proportional to
the corresponding gluon or quark colour factor. The ratio of the hadron
multiplicity in gluon to quark jets is understood to be smaller than the colour
factor ratio due to differences in the fragmentation of the leading quark or
gluon. Novel algorithms to reconstruct the colour portraits or the colour flow
of an event are presented.
