Any groove matrix improvements on the x2?

Hi folks, the groove martix in the 8.5 versus x2. Is the groove martix more stable? Can you copy and past clips rather than drag and drop into groove cells? Groove matrix recordings comes out better and stable without any flaws and pops over the 8.5? And is it more stabilized with most midi controllers to not loosing your work flow? This is mostly all about stability between the sonar 8.5 vs x2. Thanks in advance.