One minidmad freezes multiple times a night and requires resetting. The other has just frozen once. One video is loaded with several quads. No audio or other peripheral devices. Minimad version is somewhere in the 3.0 range, same with madmapper.
The first blue miniMADs are based on the previous version of the Raspberry Pi 2.
Late blue and all the black miniMADs are based on the latest version of the Raspberry Pi 2.