I ran a test subject on VM and the process took 20 hrs to complete.But the same images on Mc pro took 58 hours.VM is 8GB and Mpro is 16 GB.I have noticed this delay happening in the past as well,where VM takes 20-24 for a single patient and Mc takes 24-30 for the same.But,this time ,its was so unexpected.Why is this happening?.Which would be more accurate,and does it mean that more time FS take,the better the results?