I own both Hikvision and Dahua cameras. In fact, I started with a bunch of Hikvision cameras but night time performance was poor and fuzzy. Over time, I have switched to Dahua Starlights exclusively to get better night time results.
BTW, Dahua camera software, in general, gets the job done. From my personal experience, Hikvision camera software can be just as "buggy" so I don't think people should be afraid of either brand based on the "buggy" statement.
I know what you mean as I install both manufactures.
I personally prefer the metal housing and build of Dahua but the camera firmware and NVR software of the Hiks gives a more solid and polished user experience.
Regarding image quality in the past I would of agreed that Dahua had the upper hand but the recent colour vue hiks ive installed have had excellent image quality using out of the box settings.
The OP is looking for a "good" PTZ camera and for that purpose I would definately go Hikvision although more costly. As from my own experience with a
SD49225XA-HNR being very cheap but very flakey
The bugs and firmware issues of autotracking removal makes the Dahua a poor choice IMO, I prefer to pay more for a better product.
Im sure the OP will get all the advise needed on these forums to make the correct choice for his/her needs.