SnapCenter has "SnapCenter Plug-In for Microsoft Windows" which is the next generation plugin for SnapDrive for Windows.
'SnapDrive' and 'SnapCenter Plug-In for Microsoft Windows' can co-exists ONLY until migration completion - if you are migrating backups from SDW/SMx to SC.
One thing you need to take care of is that SnapDrive and SnapCenter contain the same path and filename for the SnapDrive.PSModule.DLL
“C:\Windows\System32\WindowsPowerShell\v1.0\Modules\SnapDrive\SnapDrive.PSModule.dll”
So if you don't take the necessary steps, SnapCenter cmdlets will not get recognized when SnapDrive for Windows is installed.