[WernerF]

You can certainly use both. I think that they are intended to be in the same emulation ballpark, they just sound a bit different from each other. You can deactivate HEAT on any individual track and substitute VCC or use it in addition. You can also put it on your master track and tweak it there as if it was the two buss of your console. I have done all of the above and it is simply source specific. Sometimes it works for a specific track, sometimes it is too much and sometimes it almost does nothing when you add it. It's just great to have the extra flexibility. I do prefer HEAT as an overall, applied globally, application though. It is really quite fat sounding.