With SCCM there is the option to allow a Maintenance window for a group of machines (collection). So i could have a single patch schedule which defines the group of patches to be deployed and assign it to all systems. The machines would ONLY be able to download and install the patches based on the defined maintenance window.

Example:

Server Group A - midnight to 2am
Server Group B - 2am to 4am
Server Group C - 4am to 6am

Patch schedule includes all server groups. But based on the respective windows the times these servers will patch will be different.

With KACE we would have to define many different schedules to simulate this and this can be a administrative challenge.