It does exactly the same. If you really wanted you could use powershell add-windowsdriver if you wanted to be (mildy) up to date.
The powershell commands only dism anyway though so no point unless you prefer the syntax.
Here you go then - what is the difference:
Dism /Add-Driver /Driver:D:\Lenovo_Drivers /Recurse
Only difference is - or /. The same thing is done anyway.
Add-WindowsDriver -Driver D:\Lenovo_Drivers -Recurse
To be honest with you. I use pnputil.exe or powershell. I find the dism syntax confusing. Backwards and forwards with the slash thing. Then you have a colon. Or a semi. Seems a bit dodgy to me.
All of them do the same thing though so it makes (as they say) no odds either way.