"Enforce mandatory fields" in transform maps or "Data policy" which is better??

[rm3]

Hi all, i  have a requirement to import some user data using import set and in my User table i need to enforce 2 mandatory fields.  I m not sure whether i must use " enforce mandatory fields" option available in transform map or create data policy for the same.

Which one would be better? Will i get the same result through both the options? Plz suggest.................. 

Thanks 

[Jace Benson · Accepted solution]

I would use Data Policies if possible.  they are enforced at every level (rest/soap/import sets/scripts/User interations [if you tell is to also work as a ui policy])

IMO it's just a better way to do it.