My experience from a few races and lots of training is that MM4 is quick if you find a good setup for your driving style, something i haven't really found...
Last race i drove it as RM3. It's much more easy and forgiving, but not rapid fast. But what i lose in lap times, i gain on not making mistakes.
I will work more with the RM3 setup and try to make it a bit more agile and aggressive.
This is driving on high grip carpet, and my personal thoughts. As said above, try the configurations out, it's so easy to rebuild the car
