Lets start with some sample images at night. Huisun is running 8k bitrate (maximum in NVR) while Longse 12k bitrate. Keep in mind both use the same IMX322+S2L. This is patch black setting, so only IR light.
So far my findings:
Image quality appears slight better then Huisun mini v2 with ISO+ setting on, without it about the same
Zoom speed is kind of slow, but without PT functions it really doesn't matter
Focus while not instant seems to be spot on, need to spend more time testing it
No corridor mode (unlike s500)
Body is identical s500, only difference as we know it are internals, I took it apart, but didn't see anything exciting. The cord is too long with external POE module. All parts have solid all metal build. Feels like an expensive cam which would last.
Interface with the PTZ button
The PTZ menu, even though there is no PTZ, just Z
Full wide. IR on. Default ISO+ setting
Full wide. IR on + Huisun IR on. Default ISO+ setting
Full wide. IR on. Disabled ISO+ setting
Full Tele. IR On. Default ISO+ setting
Full Tele. IR On. Disabled ISO+ setting
Huisun v2 full wide
Huisun v2 1.8x zoom