NaBH4/NiCl2 reduction of arylacetonitriles to PEAs

[Rhodium]

https://www.thevespiary.org/rhodium/Rhodium/chemistry/nitrile2amine.nickelboride.html

[starlight]

whereas sonication was necessary to get decent yields when reducing P2NPs.

Are nitriles easier to reduce than nitropropenes?

Or is it using dry reagents for the reaction?

Or both?

[Rhodium]

Nitriles are much easier to reduce than nitroalkenes.