Difference between QS6.1 and QS7

Posted by Jimmy McIntosh on April 04, 2002 at 15:48:45:

What is the difference between the QS6.1 and a QS7?

I understand that the QS6.1 has the QS7 and QS8 piano sounds but are the rest of the QS6's sounds inferior compared to the QS7/8?