I would suggest you to run the SWPM tool , and check whether the option for your system is available . If Option is there , you can go ahead , there wont be any much difference . As you may experience , SAP always confuses with the naming conventions . If SWPM tool not giving you he option, better raise an OSS , ask them for relevant inst master, which might be archived , and they will provide you the link.
Regards,
Nibu Antony