  Development of reliable interatomic potentials is crucial for theoretical
studies of relationship between chemical composition, structure and observable
properties in glass-forming metallic alloys. Due to ambiguity of potential
parametrization procedure, some crucial properties of the system, such as
crystallization stability or symmetry of the ground state crystal phase, may
not be correctly reproduced in computer simulations. Here we address this issue
for ${\rm Cu_{64.5}Zr_{35.5}}$ alloy described by two modifications of embedded
atom model potential as well as by \textit{ab initio} molecular dynamics. We
observe that, at low supercooling, both models provide very similar liquid
structure, which agrees with that obtained by \textit{ab initio} simulations.
Hoverer, deeply supercooled liquids demonstrate essentially different local
structure and so different crystallization stability. The system, which
demonstrate more pronounced icosahedral sort-range order, is more stable to
crystallization that is in agreement with Frank hypothesis.
