Image quality and visibility of IR. What range IR does the Hik have? Meaning how bright is it's red glow? Most end users might not notice, but in some environments, this might be a security issue for some particular customers.
Axis uses an 850nm IR led, which is barely visible unless pointing straight at you. External 940nm IRs are also available that are completely invisible.
I've used a Bosch starlight with an external IR spotlight, which was invisible. It gave a consistent image during the night for the entire scene no matter how far away the subject / objects were. Its not a cheap / value setup. Customer was particular.