Chopjock
I'm not sure you are right there.
Have you considered the Bell 214 v Bell 212 for example?
look at why the 214 was upgraded to the ST - performance, with safety as an added benefit.
The Bell 214ST was originally developed as a military project from the Bell 214B BigLifter, specifically for production in
Iran and the development by Bell was funded by the Iranian government.
[2] The fundamental difference was the replacement of the Model 214's single
Lycoming LTC-4 turboshaft engine with two 1,625 shp (1,212 kW)
General Electric T700 engines, to improve the helicopter's hot and high performance and improve safety.
As for the Kmax - it has a single purpose which doesn't include CAT.