Quality (Dual stack) Refresh with SQL Server 2005 databse?

Hi Everybody,

I want to do Quality Refresh on my current landscape as SAP ECC 6.0 Ehp 4 (ABAP+Java) stack with SQL Server 2005 as database from production server.

I have some questions as

1. Is System Copy and System Refresh are same task? If NO, then what is the difference?

2. We have production server situated far away from quality server. So, what is the best possible way to move production server database (115 GB) backup?

Kindly share me relavent document for Sytem refresh.

Thanks in Advance.

Regards

Suresh