Convert rowversion to varchar in SQL Server 2005

Hi,

I need to be able to compare Rowversion to be able to detect data changes for an ETL process. I am using SQL Server 2005. The process needs to convert to varchar for comparison. I have trawled the net for some suggestions but I think there is a problem with case sensitivity:

When I run select min_active_rowversion() this is retuned - 0x0000000002514EB9

When I run SELECT sys.fn_sqlvarbasetostr(min_active_rowversion())
or
SELECT master.dbo.fn_varbintohexstr(min_active_rowversion())
0x0000000002514eb9 is returned which is a different value to that returned by min_active_rowversion()

Is there a process that I can use to be able to return the value of min_active_rowversion() as a varchar?

Many thanks