Crowdion being an interstitial type zero dimensional defect can form different complexes and clusters allowing the realization of effective propagation modes inaccessible for a single defect. For instance, recent studies of m- and n-crowdion configurations allowed one to figure out a set of specific features, including mass transfer, formation of voidions and remote vacancies. However, it is well known that the dynamics of defects in the lattice strongly depends on the interatomic potential as well as the lattice type of a considered structure. A significant part of the research on crowdions was carried out on bcc metals, since they are used in radiation, nuclear and other areas associated with extreme exposure. In this work, we perform the simulation of 4-crowdions in bcc W and fcc Ni in order to verify the presence of fundamental differences in the defect propagation dynamics in different lattices. [ABSTRACT FROM AUTHOR]