The PRO cameras have generally been the higher-resolution cameras (for the H4-PRO series, they start at 8MP and go up to 30MP, or 4K-7K). The PRO series have also only come in one form-factor, a "body" camera that accepts a Canon EF or EF-S lens (depending on model/generation).
The HD cameras range from 1MP to now 8MP, and come in a variety of form-factors (indoor bullet, dome, outdoor bullet, PTZ, etc.)
The most recent camera line update, the topic of this thread, is the H4 ("non-Pro") camera lineup.
Both of these are part of the overall H4 product lineup.
For the last several years (maybe longer, I don't know off the top of my head) Avigilon's camera lineup has included "Standard" and "Pro" product lines. Until recently the PRO line was on a newer generation platform (H4) than the "Standard" line (which is not really called "Standard"), which was the H3.
Now the majority of products (excluding microdome, PTZ, HD Multisensor) are on the H4 platform/technology.
I was provided a hands-on introduction to the H4 products last week. (bullet, dome, box)
The bullet has been reshaped slightly, and is a bit "fatter" than the older version. I liked the lower profile of the old bullets better than the larger H4 model. The domes have gone from rounded to square(ish) with rounded corners. I think the new domes look better from an aesthetic perspective.
The new swing hook on the bullet is a nice added feature. The dome base has a wire hanger attached to it.
In the box camera, they offer a 4.7-84.6 mm lens option (web site shows 1 and 2 MP models, but the rep told me the 3 MP as well, I believe). Wish this was available in the 5 MP model . . .
I did not have time to connect and test video functionality and new firmware. I did, however, order one of the new 8MP bullets. (only available with 3-9mm lens). I would love to see the 4.7-84.6 lens on the bullet line as well (including the 5 and 8 MP models).
I was told the micro dome camera models are unchanged and do not have the built-in analytics that the new H4 models have.
Here is the h3 bullet compared to the h4 bullet (physically) on my instagram:
I thought I would hate the hooks but they work out well - I'll still complain about the mounting holes on the jbox are too small for the size tapcons we use so we still need to make the holes larger with a bit
Overall picture quality is better as they have upgraded the glass they use for the lens, the camera also feels about 2x as heavy as the h3.