STD 2008 R2 on one DC vs ENT 2008 R2 on other DC for raising domain and forest level!!!

I had this question after viewing Service Pack Levels for Domain Controllers befpre raising Domain/Forest Function Levels frm 2003 to 2008 R2.

Follow-up question... Is there going to be an impact from the fact that one of the DC's is running 2008 R2 ENTERPRISE and the other 2008 R2 STANDARD?????
Laszlo DenesAsked:
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BillBondoCommented:
Im sure when you go to raise the level it will only allow you whats possible. You could try  on both and see what it allows before committing.
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Laszlo DenesAuthor Commented:
Sorry that does not make sense. What do you mean I can try both? I wanted to know if AD cares that one DC is ENT 2008 R2 and the other STD 2008 R2. I would of course use the primary DC (ENT 2008 R2) to do the domain/forest raise, but will the fact that the other is 2008 R2 but STD edition matter, i.e. do they need to be only on the same o/s version (2008 R2 and both have that) or also on the same release version?
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BillBondoCommented:
Its been a while but before you commit to raising you will see what level it can be raised to. So I said to see what each one offers and I believe you can only raise it as high as the lowest DC in the org. I may be wrong but there is no r2 standard?  I believe R2 is Ent.
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Laszlo DenesAuthor Commented:
Okay thanks that clarifies it.
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