Thanks for the response.
I see the differences in the syscheck table as you predicted. However I am note sure how " the server was updated to quote identifiers in check constraints". If I add a new identical constraint, to both databases one gets the quotes and one doesn't and I cannot work out why. The database options that I thought would effect this quoted_identifier, quote_all_identifier options are the same in both databases.
The quotes are also around columns referred to in views, stored procedures etc.
The main reason for trying to work this out is because I am trying to compare schema changes between two different version of the same database and get a massive number of differences just because of the quotes.
