Resource Pool issue with PowerCLI

Hi Everyone

I'm trying to understand why I have these differences below:

1) When I ran this command from PowerCLI console "Get-ResourcePool 1_OVC01_GOLD". The result is :

2) When I ran the same command from a PS1 PowerShell Script, the result is different :

ParentId                 : ResourcePool-resgroup-411

Parent                   : Resources

CpuSharesLevel           : Custom

NumCpuShares             : 2000

CpuReservationMHz        : 0

CpuExpandableReservation : True

CpuLimitMHz              : -1

MemSharesLevel           : Custom

NumMemShares             : 2000

MemReservationMB         : 1045

MemExpandableReservation : True

MemLimitMB               : -1

Name                     : 1_OVC01_GOLD

CustomFields             : {}

ExtensionData            : VMware.Vim.ResourcePool

Id                       : ResourcePool-resgroup-3603

Uid                      : /VIServer=serv_vcadmin@am.lafargeone.net@amavcs01.am.lafargeone.net:443/ResourcePool=ResourcePool-resgroup-3603/

3) I would like to extract the values of NumCpuShares and NumMemShares on some output but the following comment doesn't work. Can someone explain me why ?

Get-ResourcePool 1_OVC01_GOLD | Select-String -pattern "NumCpuShares"

Get-ResourcePool 1_OVC01_GOLD | Select-String -pattern "NumMemShares"

Thanks for your help.

JEFF