Tape drives in device manager

BE 2012 setup.. msl 4048 library with 2 lto 4 tape drives.. windows 2008 r2 media server.. one of the tape drives show as hp lto 4 ultrium drive whereas the 2nd tape drive shows hp ultrium 4-scsi. I have installed the symantec drivers so confused as to why 1 is showing as hp 4-scsi drive.. the same library and drive is zoned to another media server also win2k8 and both drives show up in device manager as hp ultrium lto4 drives.. any idea why hp 4 scsi ?
Thanks