I've had recent recurring bugs/crashing rendering MP4s with Magix AVC/AAC in VMS15 Platinum. I'd switched from Main Concept as soon as I had a Magix version of VMS. I just switched back to Main Concept which rendered without a problem.
At this point I don't want to diagnose the problems because I'm in production of several shoots. Besides I have VMS16 Platinum which successfully rendered the same projects with Magix AVC/AAC.
And granted I may be picking up Main Concept from previous versions of VMS. And I'm trying to stay conservative in using VMS15 to finish the existing projects while waiting to see any more reported problems with 16.
All of which brings me to my actual question (thanks for reading this far!): Please compare the two renderers, recommend one or the other, or point me to the specs.