GetType used in PowerShell, difference between variables

Question

What is the difference between variables $a and $b?

$a = (Get-Date).DayOfWeek
$b = Get-Date | Select-Object DayOfWeek

Answer 1

Select-Object creates a new psobject and copies the properties you requested to it. You can verify this with GetType():

PS > $a.GetType().fullname
System.DayOfWeek

PS > $b.GetType().fullname
System.Management.Automation.PSCustomObject