powershell cmdet vs basic function argument handling

cmdlettest.ps1

function Get-EvilCmdLet {
  [CmdletBinding()]
  param(
    [ValidateSet('A', 'B')]
    $Category
  )
  Write-Output "= Get-EvilCmdLet =" 
  Write-Output "* PSBoundParameters"
  $PSBoundParameters.Keys | % {
    Write-Output "  ** $_ -> $($PSBoundParameters[$_])"
  }
  Write-Output "* args"
  $args | % {
    Write-Output "  ** $_"
  }
}

function Get-EvilBasic {
  param(
    $Category
  )
  Write-Output "= Get-EvilBasic =" 
  Write-Output "* PSBoundParameters"
  $PSBoundParameters.Keys | % {
    Write-Output "  ** $_ -> $($PSBoundParameters[$_])"
  }
  Write-Output "* args"
  $args | % {
    Write-Output "  ** $_"
  }
}

Get-EvilBasic "A" -foo bar -verbose
Get-EvilCmdLet "B" -foo bar -verbose