Switching from another NVR platform to Dahua, I have an install of ~30 54IR and Color4M cams, and I want to have Wizseek features, I believe in this case the cameras can do most of the ai work, what would I be lacking by using the older S2? I know the 2XI uses a better model, and might have faster searches, but do limitations only come in to play when using non-acupic cameras? As long as all my cams are ai enabled both NVRs would work pretty similar other than slower search results?