Upgrade ConfigMgr 2012 R2 to SP1 with SP2 media (confusing)

Today I started my first (and second) ConfigMgr 2012 R2 upgrade. When looking on Microsoft Evaluation Center, there is the choice between ConfigMgr 2012 R2 SP1 and ConfigMgr 2012 SP2 media. When looking at ConfigMgr 2012 R2 SP1 there's the choice between a SP2 and SP1 file as well. Strange thing is SP2 is 762MB in size and SP1 is only 1,10MB in size. Let's have a look at some more information about this (Preinstall Information).
 

Upgrading your installation: If you have a System Center 2012 R2 Configuration Manager installation, you can use the System Center 2012 Configuration Manager SP2 media to install the latest patches and automatically upgrade to System Center 2012 R2 Configuration Manager SP1.
New installation: Install System Center 2012 Configuration Manager SP2 first, and then install System Center 2012 R2 Configuration Manager SP1 at the top-tier site of your hierarchy. Both of these installation files are included as part of this evaluation.
 

Error message when starting SP1 installation before SP2

When SP2 is installed, you can install SP1 successfully
(but it's needed only on new installations)

So yes, you must actually run ConfigMgr 2012 SP2 when you have ConfigMgr 2012 R2 SP1 installed. Very confusing if you ask me? Using ConfigMgr 2012 R2 SP1 is needed only for new installations at the top-tier site of your hierarchy. Crazy it's less then 5MB in size!? Otherwise it's not needed to install this file (but it surely does install fine after ConfigMgr 2012 SP2 too). Just checked that one too.

The installation/upgrade went fine after all, and was done within 60 minutes. The second upgrade was done within 100 minutes, but was a larger site to upgrade. There will be new functionality added to the ConfigMgr console and boot images as well. This will be mentioned in another blogpost published soon. Because R2 functionality is built-in, no need to use R2 media anymore!

After installation the version has changed to 5.00.8239.1000 in About Configuration Manager dialog box and Site server properties. The current ConfigMgr 2012 R2 key will work with R2 SP1 also.
 
More information about the servicepack can be found here: ConfigMgr 2012 R2 SP1 and ConfigMgr 2012 SP2 released
 
Microsoft websites to visit:
What's New in System Center 2012 R2 Configuration Manager SP1
Announcing the availability of System Center 2012 R2 Configuration Manager SP1 and System Center 2012 Configuration Manager SP2
Planning to Upgrade System Center 2012 Configuration Manager