Need help in getting a special AD Group

Hi experts ;-)

I'm having a Problem with searching a special Active Directory Group:

I've build two Groups: Info and Test. Info is a Distribution Group. Test a Security Group.

I tried to get the Info Group by using: 1. Get-ADGroup -Identity Info and  2.Get-ADGroup -Identity Test

Results:

1. Cannot find an object with identity: 'Info' under: 'DC=example,DC=de'

2. Works fine and Shows me the Group Infos.

So, is there a difference by using Get-ADGroup for Security Groups and Distribution Grpups?

Thanks a lot for your hel!