Exchange 2010 version under Exchange Management Shell is Different with Exchange Management Console

The version number you can see from Get-ExchangeServer only displays the latest Service Pack; in order to check the actual installed Update Rollup, you need to go to the Control Panel. Also, the version number you can see from the EMC isn't relevant at all.

Here are the current version numbers for all Exchange 2010 SP3 rollups: https://social.technet.microsoft.com/wiki/contents/articles/240.exchange-server-and-update-rollup-build-numbers.aspx#H

Agree with Massimo, you could view the current service pack version via the cmdlet Get-ExchangeServer, and view the installed Rollup version via EMC or Control Panel.

Besides, the following command can also tell you the current RU version and SP version:

Get-Command Exsetup.exe | ForEach-Object {$_.FileVersionInfo}

And the following related blog is for your reference: How To Check Exchange Rollup Version