Global Stable And Xiaomi.eu Rom Difference


If I want to flash stable, do I only have to wipe dalvik+cache+data? Or also system, storage or sd card?
And does stable need a manual installation of GApps?
 
From when i use Xiaomi.eu it happens that Google mail me to inform that blocked violations attempts in my gMail accounts.
From turkey, Malaysia and so on....

In officiale stable or developer ROM this never happens. A little more difference between Xiaomi.eu and official or stable must be in.