Overall I liked the Hikvision MUCH better, even though I ended up returning it. Deterrence works, and the 2-way audio is important. The audio (from the microphone) is pretty bad on the Dahua 4k-T (even worse on the 4k-X). The mic was also worlds better on the Hik, and the speaker was decent. Hikvision releases firmware updates for bug fixes and new features (sometimes) frequently, and has a shared software base for their cameras by camera generation. The compression and resulting picture quality was also MUCH better from the Hikvision.
The only reason I stuck with the Dahua cams is because I needed the onboard AI to record on human / vehicle in the out-of-bounds area without a push alert, and record on human / vehicle when in-bounds with a push alert. The design flaw in the Hikvision motion detection made this impossible.
Going forward, I'll be using
Blue Iris with the Hikvision 2CD2387G2-LSU/LU cameras. I'll have the Blue Iris do its crappy human/vehicle detection based recording in the out of bounds area (which should be good enough), and rely on Hikvision Smart Events for the push notifications for the in-bounds areas, and have each Hik camera added a second time in Blue Iris with ONVIF camera based human/vehicle triggering recording for the in-bounds area.
@Bradyboyy88 - at a second property, I will be adding the 2CD2387G2-LSU/LU cameras, and am planning on the soffit mount as well.