I have a feature shot in 4k that I edited in Vegas 15. I probably unwisely tried it in 16 and some of the contrast/ brightness adjustments are totally different, as if 16 responds to a setting that was perfect in 15 totally differently. This is from opening the 15 project file into 16 so no settings were changed. Is this just the way 16 will work ? Anyway I realize changing a version in the middle of a project is not a good idea usually...