I’m wondering if the dimensions we are seeing for either aircraft are accurate. In the case of Defiant I’m not sure I’ve even seen official dimensions published anywhere. I can’t see how they fit in the same footprint as as an H-60 but your image makes a compelling argument against what Boeing/Sikorsky may be claiming.
Having said that, credit to the Army if they actually made the size requirement around a legacy aircraft and stuck to it, not an insignificant cost to revamp all Army Facilities!
flt mech